* Boston, MA 021110-1307, USA.
*/
-#define _XOPEN_SOURCE 500
-#define _GNU_SOURCE 1
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "disk-io.h"
#include "print-tree.h"
#include "transaction.h"
-#include "version.h"
#include "utils.h"
#include "commands.h"
#include "free-space-cache.h"
u32 found_ref;
};
+/*
+ * Much like data_backref, just removed the undetermined members
+ * and change it to use list_head.
+ * During extent scan, it is stored in root->orphan_data_extent.
+ * During fs tree scan, it is then moved to inode_rec->orphan_data_extents.
+ */
+struct orphan_data_extent {
+ struct list_head list;
+ u64 root;
+ u64 objectid;
+ u64 offset;
+ u64 disk_bytenr;
+ u64 disk_len;
+};
+
struct tree_backref {
struct extent_backref node;
union {
u64 info_objectid;
u32 num_duplicates;
u8 info_level;
+ int flag_block_full_backref;
unsigned int found_rec:1;
unsigned int content_checked:1;
unsigned int owner_ref_checked:1;
unsigned int is_root:1;
unsigned int metadata:1;
- unsigned int flag_block_full_backref:1;
+ unsigned int bad_full_backref:1;
+ unsigned int crossing_stripes:1;
};
struct inode_backref {
struct list_head list;
u64 objectid;
u64 bytenr;
+ u64 last_snapshot;
u8 level;
u8 drop_level;
int level_size;
#define REF_ERR_DUP_ROOT_REF (1 << 11)
#define REF_ERR_DUP_ROOT_BACKREF (1 << 12)
+struct file_extent_hole {
+ struct rb_node node;
+ u64 start;
+ u64 len;
+};
+
+/* Compatible function to allow reuse of old codes */
+static u64 first_extent_gap(struct rb_root *holes)
+{
+ struct file_extent_hole *hole;
+
+ if (RB_EMPTY_ROOT(holes))
+ return (u64)-1;
+
+ hole = rb_entry(rb_first(holes), struct file_extent_hole, node);
+ return hole->start;
+}
+
+static int compare_hole(struct rb_node *node1, struct rb_node *node2)
+{
+ struct file_extent_hole *hole1;
+ struct file_extent_hole *hole2;
+
+ hole1 = rb_entry(node1, struct file_extent_hole, node);
+ hole2 = rb_entry(node2, struct file_extent_hole, node);
+
+ if (hole1->start > hole2->start)
+ return -1;
+ if (hole1->start < hole2->start)
+ return 1;
+ /* Now hole1->start == hole2->start */
+ if (hole1->len >= hole2->len)
+ /*
+ * Hole 1 will be merge center
+ * Same hole will be merged later
+ */
+ return -1;
+ /* Hole 2 will be merge center */
+ return 1;
+}
+
+/*
+ * Add a hole to the record
+ *
+ * This will do hole merge for copy_file_extent_holes(),
+ * which will ensure there won't be continuous holes.
+ */
+static int add_file_extent_hole(struct rb_root *holes,
+ u64 start, u64 len)
+{
+ struct file_extent_hole *hole;
+ struct file_extent_hole *prev = NULL;
+ struct file_extent_hole *next = NULL;
+
+ hole = malloc(sizeof(*hole));
+ if (!hole)
+ return -ENOMEM;
+ hole->start = start;
+ hole->len = len;
+ /* Since compare will not return 0, no -EEXIST will happen */
+ rb_insert(holes, &hole->node, compare_hole);
+
+ /* simple merge with previous hole */
+ if (rb_prev(&hole->node))
+ prev = rb_entry(rb_prev(&hole->node), struct file_extent_hole,
+ node);
+ if (prev && prev->start + prev->len >= hole->start) {
+ hole->len = hole->start + hole->len - prev->start;
+ hole->start = prev->start;
+ rb_erase(&prev->node, holes);
+ free(prev);
+ prev = NULL;
+ }
+
+ /* iterate merge with next holes */
+ while (1) {
+ if (!rb_next(&hole->node))
+ break;
+ next = rb_entry(rb_next(&hole->node), struct file_extent_hole,
+ node);
+ if (hole->start + hole->len >= next->start) {
+ if (hole->start + hole->len <= next->start + next->len)
+ hole->len = next->start + next->len -
+ hole->start;
+ rb_erase(&next->node, holes);
+ free(next);
+ next = NULL;
+ } else
+ break;
+ }
+ return 0;
+}
+
+static int compare_hole_range(struct rb_node *node, void *data)
+{
+ struct file_extent_hole *hole;
+ u64 start;
+
+ hole = (struct file_extent_hole *)data;
+ start = hole->start;
+
+ hole = rb_entry(node, struct file_extent_hole, node);
+ if (start < hole->start)
+ return -1;
+ if (start >= hole->start && start < hole->start + hole->len)
+ return 0;
+ return 1;
+}
+
+/*
+ * Delete a hole in the record
+ *
+ * This will do the hole split and is much restrict than add.
+ */
+static int del_file_extent_hole(struct rb_root *holes,
+ u64 start, u64 len)
+{
+ struct file_extent_hole *hole;
+ struct file_extent_hole tmp;
+ u64 prev_start = 0;
+ u64 prev_len = 0;
+ u64 next_start = 0;
+ u64 next_len = 0;
+ struct rb_node *node;
+ int have_prev = 0;
+ int have_next = 0;
+ int ret = 0;
+
+ tmp.start = start;
+ tmp.len = len;
+ node = rb_search(holes, &tmp, compare_hole_range, NULL);
+ if (!node)
+ return -EEXIST;
+ hole = rb_entry(node, struct file_extent_hole, node);
+ if (start + len > hole->start + hole->len)
+ return -EEXIST;
+
+ /*
+ * Now there will be no overflap, delete the hole and re-add the
+ * split(s) if they exists.
+ */
+ if (start > hole->start) {
+ prev_start = hole->start;
+ prev_len = start - hole->start;
+ have_prev = 1;
+ }
+ if (hole->start + hole->len > start + len) {
+ next_start = start + len;
+ next_len = hole->start + hole->len - start - len;
+ have_next = 1;
+ }
+ rb_erase(node, holes);
+ free(hole);
+ if (have_prev) {
+ ret = add_file_extent_hole(holes, prev_start, prev_len);
+ if (ret < 0)
+ return ret;
+ }
+ if (have_next) {
+ ret = add_file_extent_hole(holes, next_start, next_len);
+ if (ret < 0)
+ return ret;
+ }
+ return 0;
+}
+
+static int copy_file_extent_holes(struct rb_root *dst,
+ struct rb_root *src)
+{
+ struct file_extent_hole *hole;
+ struct rb_node *node;
+ int ret = 0;
+
+ node = rb_first(src);
+ while (node) {
+ hole = rb_entry(node, struct file_extent_hole, node);
+ ret = add_file_extent_hole(dst, hole->start, hole->len);
+ if (ret)
+ break;
+ node = rb_next(node);
+ }
+ return ret;
+}
+
+static void free_file_extent_holes(struct rb_root *holes)
+{
+ struct rb_node *node;
+ struct file_extent_hole *hole;
+
+ node = rb_first(holes);
+ while (node) {
+ hole = rb_entry(node, struct file_extent_hole, node);
+ rb_erase(node, holes);
+ free(hole);
+ node = rb_first(holes);
+ }
+}
+
struct inode_record {
struct list_head backrefs;
unsigned int checked:1;
u64 found_size;
u64 extent_start;
u64 extent_end;
- u64 first_extent_gap;
+ struct rb_root holes;
+ struct list_head orphan_extents;
u32 refs;
};
#define I_ERR_ODD_CSUM_ITEM (1 << 11)
#define I_ERR_SOME_CSUM_MISSING (1 << 12)
#define I_ERR_LINK_COUNT_WRONG (1 << 13)
+#define I_ERR_FILE_EXTENT_ORPHAN (1 << 14)
struct root_backref {
struct list_head list;
struct inode_record *rec;
struct inode_backref *backref;
struct inode_backref *orig;
+ struct orphan_data_extent *src_orphan;
+ struct orphan_data_extent *dst_orphan;
size_t size;
+ int ret;
rec = malloc(sizeof(*rec));
memcpy(rec, orig_rec, sizeof(*rec));
rec->refs = 1;
INIT_LIST_HEAD(&rec->backrefs);
+ INIT_LIST_HEAD(&rec->orphan_extents);
+ rec->holes = RB_ROOT;
list_for_each_entry(orig, &orig_rec->backrefs, list) {
size = sizeof(*orig) + orig->namelen + 1;
memcpy(backref, orig, size);
list_add_tail(&backref->list, &rec->backrefs);
}
+ list_for_each_entry(src_orphan, &orig_rec->orphan_extents, list) {
+ dst_orphan = malloc(sizeof(*dst_orphan));
+ /* TODO: Fix all the HELL of un-catched -ENOMEM case */
+ BUG_ON(!dst_orphan);
+ memcpy(dst_orphan, src_orphan, sizeof(*src_orphan));
+ list_add_tail(&dst_orphan->list, &rec->orphan_extents);
+ }
+ ret = copy_file_extent_holes(&rec->holes, &orig_rec->holes);
+ BUG_ON(ret < 0);
+
return rec;
}
+static void print_orphan_data_extents(struct list_head *orphan_extents,
+ u64 objectid)
+{
+ struct orphan_data_extent *orphan;
+
+ if (list_empty(orphan_extents))
+ return;
+ printf("The following data extent is lost in tree %llu:\n",
+ objectid);
+ list_for_each_entry(orphan, orphan_extents, list) {
+ printf("\tinode: %llu, offset:%llu, disk_bytenr: %llu, disk_len: %llu\n",
+ orphan->objectid, orphan->offset, orphan->disk_bytenr,
+ orphan->disk_len);
+ }
+}
+
static void print_inode_error(struct btrfs_root *root, struct inode_record *rec)
{
u64 root_objectid = root->root_key.objectid;
fprintf(stderr, ", some csum missing");
if (errors & I_ERR_LINK_COUNT_WRONG)
fprintf(stderr, ", link count wrong");
+ if (errors & I_ERR_FILE_EXTENT_ORPHAN)
+ fprintf(stderr, ", orphan file extent");
fprintf(stderr, "\n");
+ /* Print the orphan extents if needed */
+ if (errors & I_ERR_FILE_EXTENT_ORPHAN)
+ print_orphan_data_extents(&rec->orphan_extents, root->objectid);
+
+ /* Print the holes if needed */
+ if (errors & I_ERR_FILE_EXTENT_DISCOUNT) {
+ struct file_extent_hole *hole;
+ struct rb_node *node;
+ int found = 0;
+
+ node = rb_first(&rec->holes);
+ fprintf(stderr, "Found file extent holes:\n");
+ while (node) {
+ found = 1;
+ hole = rb_entry(node, struct file_extent_hole, node);
+ fprintf(stderr, "\tstart: %llu, len: %llu\n",
+ hole->start, hole->len);
+ node = rb_next(node);
+ }
+ if (!found)
+ fprintf(stderr, "\tstart: 0, len: %llu\n",
+ round_up(rec->isize, root->sectorsize));
+ }
}
static void print_ref_error(int errors)
rec = calloc(1, sizeof(*rec));
rec->ino = ino;
rec->extent_start = (u64)-1;
- rec->first_extent_gap = (u64)-1;
rec->refs = 1;
INIT_LIST_HEAD(&rec->backrefs);
+ INIT_LIST_HEAD(&rec->orphan_extents);
+ rec->holes = RB_ROOT;
node = malloc(sizeof(*node));
node->cache.start = ino;
return rec;
}
+static void free_orphan_data_extents(struct list_head *orphan_extents)
+{
+ struct orphan_data_extent *orphan;
+
+ while (!list_empty(orphan_extents)) {
+ orphan = list_entry(orphan_extents->next,
+ struct orphan_data_extent, list);
+ list_del(&orphan->list);
+ free(orphan);
+ }
+}
+
static void free_inode_rec(struct inode_record *rec)
{
struct inode_backref *backref;
list_del(&backref->list);
free(backref);
}
+ free_orphan_data_extents(&rec->orphan_extents);
+ free_file_extent_holes(&rec->holes);
free(rec);
}
rec->errors |= I_ERR_ODD_DIR_ITEM;
if (rec->found_size != rec->nbytes)
rec->errors |= I_ERR_FILE_NBYTES_WRONG;
- if (rec->extent_start == (u64)-1 || rec->extent_start > 0)
- rec->first_extent_gap = 0;
if (rec->nlink > 0 && !no_holes &&
(rec->extent_end < rec->isize ||
- rec->first_extent_gap < rec->isize))
+ first_extent_gap(&rec->holes) < rec->isize))
rec->errors |= I_ERR_FILE_EXTENT_DISCOUNT;
}
{
struct inode_backref *backref;
u32 dir_count = 0;
+ int ret = 0;
dst->merging = 1;
list_for_each_entry(backref, &src->backrefs, list) {
dst->found_csum_item = 1;
if (src->some_csum_missing)
dst->some_csum_missing = 1;
- if (dst->first_extent_gap > src->first_extent_gap)
- dst->first_extent_gap = src->first_extent_gap;
+ if (first_extent_gap(&dst->holes) > first_extent_gap(&src->holes)) {
+ ret = copy_file_extent_holes(&dst->holes, &src->holes);
+ if (ret < 0)
+ return ret;
+ }
BUG_ON(src->found_link < dir_count);
dst->found_link += src->found_link - dir_count;
} else {
if (dst->extent_end > src->extent_start)
dst->errors |= I_ERR_FILE_EXTENT_OVERLAP;
- else if (dst->extent_end < src->extent_start &&
- dst->extent_end < dst->first_extent_gap)
- dst->first_extent_gap = dst->extent_end;
+ else if (dst->extent_end < src->extent_start) {
+ ret = add_file_extent_hole(&dst->holes,
+ dst->extent_end,
+ src->extent_start - dst->extent_end);
+ }
if (dst->extent_end < src->extent_end)
dst->extent_end = src->extent_end;
}
path.slots[0]++;
}
out:
+ btrfs_release_path(&path);
if (ret < 0)
return ret;
- btrfs_release_path(&path);
return 0;
}
if (rec->extent_end > key->offset)
rec->errors |= I_ERR_FILE_EXTENT_OVERLAP;
- else if (rec->extent_end < key->offset &&
- rec->extent_end < rec->first_extent_gap)
- rec->first_extent_gap = rec->extent_end;
+ else if (rec->extent_end < key->offset) {
+ ret = add_file_extent_hole(&rec->holes, rec->extent_end,
+ key->offset - rec->extent_end);
+ if (ret < 0)
+ return ret;
+ }
fi = btrfs_item_ptr(eb, slot, struct btrfs_file_extent_item);
extent_type = btrfs_file_extent_type(eb, fi);
}
rec->extent_end = key->offset + num_bytes;
- if (disk_bytenr > 0) {
+ /*
+ * The data reloc tree will copy full extents into its inode and then
+ * copy the corresponding csums. Because the extent it copied could be
+ * a preallocated extent that hasn't been written to yet there may be no
+ * csums to copy, ergo we won't have csums for our file extent. This is
+ * ok so just don't bother checking csums if the inode belongs to the
+ * data reloc tree.
+ */
+ if (disk_bytenr > 0 &&
+ btrfs_header_owner(eb) != BTRFS_DATA_RELOC_TREE_OBJECTID) {
u64 found;
if (btrfs_file_extent_compression(eb, fi))
num_bytes = btrfs_file_extent_disk_num_bytes(eb, fi);
reada_walk_down(root, cur, path->slots[*level]);
next = read_tree_block(root, bytenr, blocksize,
ptr_gen);
- if (!next) {
+ if (!extent_buffer_uptodate(next)) {
struct btrfs_key node_key;
btrfs_node_key_to_cpu(path->nodes[*level],
return ret;
}
+static int repair_inode_nbytes(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path,
+ struct inode_record *rec)
+{
+ struct btrfs_inode_item *ei;
+ struct btrfs_key key;
+ int ret = 0;
+
+ key.objectid = rec->ino;
+ key.type = BTRFS_INODE_ITEM_KEY;
+ key.offset = 0;
+
+ ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
+ if (ret) {
+ if (ret > 0)
+ ret = -ENOENT;
+ goto out;
+ }
+
+ /* Since ret == 0, no need to check anything */
+ ei = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_inode_item);
+ btrfs_set_inode_nbytes(path->nodes[0], ei, rec->found_size);
+ btrfs_mark_buffer_dirty(path->nodes[0]);
+ rec->errors &= ~I_ERR_FILE_NBYTES_WRONG;
+ printf("reset nbytes for ino %llu root %llu\n",
+ rec->ino, root->root_key.objectid);
+out:
+ btrfs_release_path(path);
+ return ret;
+}
+
static int add_missing_dir_index(struct btrfs_root *root,
struct cache_tree *inode_cache,
struct inode_record *rec,
struct btrfs_inode_item *inode_item;
int ret = 0;
+ /* We don't believe this either, reset it and iterate backref */
+ rec->found_link = 0;
+
/* Remove all backref including the valid ones */
list_for_each_entry_safe(backref, tmp, &rec->backrefs, list) {
ret = btrfs_unlink(trans, root, rec->ino, backref->dir,
backref->found_inode_ref)) {
list_del(&backref->list);
free(backref);
+ } else {
+ rec->found_link++;
}
}
BTRFS_FIRST_FREE_OBJECTID, &lost_found_ino,
mode);
if (ret < 0) {
- fprintf(stderr, "Failed to create '%s' dir: %s",
+ fprintf(stderr, "Failed to create '%s' dir: %s\n",
dir_name, strerror(-ret));
goto out;
}
ret = btrfs_add_link(trans, root, rec->ino, lost_found_ino,
namebuf, namelen, type, NULL, 1);
- if (ret == -EEXIST) {
+ /*
+ * Add ".INO" suffix several times to handle case where
+ * "FILENAME.INO" is already taken by another file.
+ */
+ while (ret == -EEXIST) {
/*
* Conflicting file name, add ".INO" as suffix * +1 for '.'
*/
}
if (ret < 0) {
fprintf(stderr,
- "Failed to link the inode %llu to %s dir: %s",
+ "Failed to link the inode %llu to %s dir: %s\n",
rec->ino, dir_name, strerror(-ret));
goto out;
}
printf("Moving file '%.*s' to '%s' dir since it has no valid backref\n",
namelen, namebuf, dir_name);
}
- rec->errors &= ~I_ERR_LINK_COUNT_WRONG;
printf("Fixed the nlink of inode %llu\n", rec->ino);
out:
+ /*
+ * Clear the flag anyway, or we will loop forever for the same inode
+ * as it will not be removed from the bad inode list and the dead loop
+ * happens.
+ */
+ rec->errors &= ~I_ERR_LINK_COUNT_WRONG;
btrfs_release_path(path);
return ret;
}
fi = btrfs_item_ptr(path->nodes[0], path->slots[0],
struct btrfs_file_extent_item);
type = btrfs_file_extent_type(path->nodes[0], fi);
- if (type != BTRFS_FILE_EXTENT_INLINE)
+ if (type != BTRFS_FILE_EXTENT_INLINE) {
ret = 1;
goto out;
+ }
}
out:
btrfs_free_path(path);
int type_recovered = 0;
int ret = 0;
- /*
- * TODO:
- * 1. salvage data from existing file extent and
- * punch hole to keep fi ext consistent.
- * 2. salvage data from extent tree
- */
printf("Trying to rebuild inode:%llu\n", rec->ino);
type_recovered = !find_file_type(rec, &filetype);
* For undetermined one, use FILE as fallback.
*
* TODO:
- * 1. If found extent belong to it in extent tree, it must be FILE
- * Need extra hook in extent tree scan.
- * 2. If found backref(inode_index/item is already handled) to it,
+ * 1. If found backref(inode_index/item is already handled) to it,
* it must be DIR.
* Need new inode-inode ref structure to allow search for that.
*/
} else if (rec->found_dir_item) {
type_recovered = 1;
filetype = BTRFS_FT_DIR;
- } else {
+ } else if (!list_empty(&rec->orphan_extents)) {
+ type_recovered = 1;
+ filetype = BTRFS_FT_REG_FILE;
+ } else{
printf("Can't determint the filetype for inode %llu, assume it is a normal file\n",
rec->ino);
type_recovered = 1;
return ret;
}
+static int repair_inode_orphan_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path,
+ struct inode_record *rec)
+{
+ struct orphan_data_extent *orphan;
+ struct orphan_data_extent *tmp;
+ int ret = 0;
+
+ list_for_each_entry_safe(orphan, tmp, &rec->orphan_extents, list) {
+ /*
+ * Check for conflicting file extents
+ *
+ * Here we don't know whether the extents is compressed or not,
+ * so we can only assume it not compressed nor data offset,
+ * and use its disk_len as extent length.
+ */
+ ret = btrfs_get_extent(NULL, root, path, orphan->objectid,
+ orphan->offset, orphan->disk_len, 0);
+ btrfs_release_path(path);
+ if (ret < 0)
+ goto out;
+ if (!ret) {
+ fprintf(stderr,
+ "orphan extent (%llu, %llu) conflicts, delete the orphan\n",
+ orphan->disk_bytenr, orphan->disk_len);
+ ret = btrfs_free_extent(trans,
+ root->fs_info->extent_root,
+ orphan->disk_bytenr, orphan->disk_len,
+ 0, root->objectid, orphan->objectid,
+ orphan->offset);
+ if (ret < 0)
+ goto out;
+ }
+ ret = btrfs_insert_file_extent(trans, root, orphan->objectid,
+ orphan->offset, orphan->disk_bytenr,
+ orphan->disk_len, orphan->disk_len);
+ if (ret < 0)
+ goto out;
+
+ /* Update file size info */
+ rec->found_size += orphan->disk_len;
+ if (rec->found_size == rec->nbytes)
+ rec->errors &= ~I_ERR_FILE_NBYTES_WRONG;
+
+ /* Update the file extent hole info too */
+ ret = del_file_extent_hole(&rec->holes, orphan->offset,
+ orphan->disk_len);
+ if (ret < 0)
+ goto out;
+ if (RB_EMPTY_ROOT(&rec->holes))
+ rec->errors &= ~I_ERR_FILE_EXTENT_DISCOUNT;
+
+ list_del(&orphan->list);
+ free(orphan);
+ }
+ rec->errors &= ~I_ERR_FILE_EXTENT_ORPHAN;
+out:
+ return ret;
+}
+
+static int repair_inode_discount_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path,
+ struct inode_record *rec)
+{
+ struct rb_node *node;
+ struct file_extent_hole *hole;
+ int found = 0;
+ int ret = 0;
+
+ node = rb_first(&rec->holes);
+
+ while (node) {
+ found = 1;
+ hole = rb_entry(node, struct file_extent_hole, node);
+ ret = btrfs_punch_hole(trans, root, rec->ino,
+ hole->start, hole->len);
+ if (ret < 0)
+ goto out;
+ ret = del_file_extent_hole(&rec->holes, hole->start,
+ hole->len);
+ if (ret < 0)
+ goto out;
+ if (RB_EMPTY_ROOT(&rec->holes))
+ rec->errors &= ~I_ERR_FILE_EXTENT_DISCOUNT;
+ node = rb_first(&rec->holes);
+ }
+ /* special case for a file losing all its file extent */
+ if (!found) {
+ ret = btrfs_punch_hole(trans, root, rec->ino, 0,
+ round_up(rec->isize, root->sectorsize));
+ if (ret < 0)
+ goto out;
+ }
+ printf("Fixed discount file extents for inode: %llu in root: %llu\n",
+ rec->ino, root->objectid);
+out:
+ return ret;
+}
+
static int try_repair_inode(struct btrfs_root *root, struct inode_record *rec)
{
struct btrfs_trans_handle *trans;
if (!(rec->errors & (I_ERR_DIR_ISIZE_WRONG |
I_ERR_NO_ORPHAN_ITEM |
I_ERR_LINK_COUNT_WRONG |
- I_ERR_NO_INODE_ITEM)))
+ I_ERR_NO_INODE_ITEM |
+ I_ERR_FILE_EXTENT_ORPHAN |
+ I_ERR_FILE_EXTENT_DISCOUNT|
+ I_ERR_FILE_NBYTES_WRONG)))
return rec->errors;
path = btrfs_alloc_path();
if (rec->errors & I_ERR_NO_INODE_ITEM)
ret = repair_inode_no_item(trans, root, path, rec);
+ if (!ret && rec->errors & I_ERR_FILE_EXTENT_ORPHAN)
+ ret = repair_inode_orphan_extent(trans, root, path, rec);
+ if (!ret && rec->errors & I_ERR_FILE_EXTENT_DISCOUNT)
+ ret = repair_inode_discount_extent(trans, root, path, rec);
if (!ret && rec->errors & I_ERR_DIR_ISIZE_WRONG)
ret = repair_inode_isize(trans, root, path, rec);
if (!ret && rec->errors & I_ERR_NO_ORPHAN_ITEM)
ret = repair_inode_orphan_item(trans, root, path, rec);
if (!ret && rec->errors & I_ERR_LINK_COUNT_WRONG)
ret = repair_inode_nlinks(trans, root, path, rec);
+ if (!ret && rec->errors & I_ERR_FILE_NBYTES_WRONG)
+ ret = repair_inode_nbytes(trans, root, path, rec);
btrfs_commit_transaction(trans, root);
btrfs_free_path(path);
return ret;
struct inode_record *rec;
struct inode_backref *backref;
int stage = 0;
- int ret;
+ int ret = 0;
int err = 0;
u64 error = 0;
u64 root_dirid = btrfs_root_dirid(&root->root_item);
ret = 0;
}
- error++;
+ if (!(repair && ret == 0))
+ error++;
print_inode_error(root, rec);
list_for_each_entry(backref, &rec->backrefs, list) {
if (!backref->found_dir_item)
}
backref = malloc(sizeof(*backref) + namelen + 1);
- memset(backref, 0, sizeof(*backref));
+ memset(backref, 0, sizeof(*backref) + namelen + 1);
backref->ref_root = ref_root;
backref->dir = dir;
backref->index = index;
ret = PTR_ERR(trans);
fprintf(stderr, "Error starting transaction: %s\n",
strerror(-ret));
- return ret;
+ goto out_free_path;
}
cache = first_cache_extent(corrupt_blocks);
while (cache) {
cache = next_cache_extent(cache);
}
out:
- btrfs_free_path(path);
btrfs_commit_transaction(trans, root);
+out_free_path:
+ btrfs_free_path(path);
return ret;
}
struct root_record *rec;
struct btrfs_root_item *root_item = &root->root_item;
struct cache_tree corrupt_blocks;
+ struct orphan_data_extent *orphan;
+ struct orphan_data_extent *tmp;
enum btrfs_tree_block_status status;
/*
*/
cache_tree_init(&corrupt_blocks);
root->fs_info->corrupt_blocks = &corrupt_blocks;
+
if (root->root_key.objectid != BTRFS_TREE_RELOC_OBJECTID) {
rec = get_root_rec(root_cache, root->root_key.objectid);
if (btrfs_root_refs(root_item) > 0)
cache_tree_init(&root_node.root_cache);
cache_tree_init(&root_node.inode_cache);
+ /* Move the orphan extent record to corresponding inode_record */
+ list_for_each_entry_safe(orphan, tmp,
+ &root->orphan_data_extents, list) {
+ struct inode_record *inode;
+
+ inode = get_inode_rec(&root_node.inode_cache, orphan->objectid,
+ 1);
+ inode->errors |= I_ERR_FILE_EXTENT_ORPHAN;
+ list_move(&orphan->list, &inode->orphan_extents);
+ }
+
level = btrfs_header_level(root->node);
memset(wc->nodes, 0, sizeof(wc->nodes));
wc->nodes[level] = &root_node;
free_corrupt_blocks_tree(&corrupt_blocks);
root->fs_info->corrupt_blocks = NULL;
+ free_orphan_data_extents(&root->orphan_data_extents);
return ret;
}
if (!cache)
break;
rec = container_of(cache, struct extent_record, cache);
- btrfs_unpin_extent(fs_info, rec->start, rec->max_size);
remove_cache_extent(extent_cache, cache);
free_all_extent_backrefs(rec);
free(rec);
{
if (rec->content_checked && rec->owner_ref_checked &&
rec->extent_item_refs == rec->refs && rec->refs > 0 &&
- rec->num_duplicates == 0 && !all_backpointers_checked(rec, 0)) {
+ rec->num_duplicates == 0 && !all_backpointers_checked(rec, 0) &&
+ !rec->bad_full_backref && !rec->crossing_stripes) {
remove_cache_extent(extent_cache, &rec->cache);
free_all_extent_backrefs(rec);
list_del_init(&rec->list);
struct btrfs_key k1, k2;
int i;
int level = path->lowest_level;
- int ret;
+ int ret = -EIO;
buf = path->nodes[level];
for (i = 0; i < btrfs_header_nritems(buf) - 1; i++) {
* Attempt to fix basic block failures. If we can't fix it for whatever reason
* then just return -EIO.
*/
-static int try_to_fix_bad_block(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
+static int try_to_fix_bad_block(struct btrfs_root *root,
struct extent_buffer *buf,
enum btrfs_tree_block_status status)
{
+ struct btrfs_trans_handle *trans;
struct ulist *roots;
struct ulist_node *node;
struct btrfs_root *search_root;
if (!path)
return -EIO;
- ret = btrfs_find_all_roots(trans, root->fs_info, buf->start,
+ ret = btrfs_find_all_roots(NULL, root->fs_info, buf->start,
0, &roots);
if (ret) {
btrfs_free_path(path);
break;
}
- record_root_in_trans(trans, search_root);
+
+ trans = btrfs_start_transaction(search_root, 0);
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ break;
+ }
path->lowest_level = btrfs_header_level(buf);
path->skip_check_block = 1;
ret = btrfs_search_slot(trans, search_root, &key, path, 0, 1);
if (ret) {
ret = -EIO;
+ btrfs_commit_transaction(trans, search_root);
break;
}
if (status == BTRFS_TREE_BLOCK_BAD_KEY_ORDER)
ret = fix_key_order(trans, search_root, path);
else if (status == BTRFS_TREE_BLOCK_INVALID_OFFSETS)
ret = fix_item_offset(trans, search_root, path);
- if (ret)
+ if (ret) {
+ btrfs_commit_transaction(trans, search_root);
break;
+ }
btrfs_release_path(path);
+ btrfs_commit_transaction(trans, search_root);
}
ulist_free(roots);
btrfs_free_path(path);
return ret;
}
-static int check_block(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
+static int check_block(struct btrfs_root *root,
struct cache_tree *extent_cache,
struct extent_buffer *buf, u64 flags)
{
if (status != BTRFS_TREE_BLOCK_CLEAN) {
if (repair)
- status = try_to_fix_bad_block(trans, root, buf,
- status);
+ status = try_to_fix_bad_block(root, buf, status);
if (status != BTRFS_TREE_BLOCK_CLEAN) {
ret = -EIO;
fprintf(stderr, "bad block %llu\n",
if (rec->max_size < max_size)
rec->max_size = max_size;
+ /*
+ * A metadata extent can't cross stripe_len boundary, otherwise
+ * kernel scrub won't be able to handle it.
+ * As now stripe_len is fixed to BTRFS_STRIPE_LEN, just check
+ * it.
+ */
+ if (metadata && check_crossing_stripes(rec->start,
+ rec->max_size))
+ rec->crossing_stripes = 1;
maybe_free_extent_rec(extent_cache, rec);
return ret;
}
rec->owner_ref_checked = 0;
rec->num_duplicates = 0;
rec->metadata = metadata;
+ rec->flag_block_full_backref = -1;
+ rec->bad_full_backref = 0;
+ rec->crossing_stripes = 0;
INIT_LIST_HEAD(&rec->backrefs);
INIT_LIST_HEAD(&rec->dups);
INIT_LIST_HEAD(&rec->list);
rec->content_checked = 1;
rec->owner_ref_checked = 1;
}
+
+ if (metadata)
+ if (check_crossing_stripes(rec->start, rec->max_size))
+ rec->crossing_stripes = 1;
return ret;
}
return error ? -EINVAL : 0;
}
-static int read_extent_data(struct btrfs_root *root, char *data,
- u64 logical, u64 *len, int mirror)
-{
- u64 offset = 0;
- struct btrfs_multi_bio *multi = NULL;
- struct btrfs_fs_info *info = root->fs_info;
- struct btrfs_device *device;
- int ret = 0;
- u64 max_len = *len;
-
- ret = btrfs_map_block(&info->mapping_tree, READ, logical, len,
- &multi, mirror, NULL);
- if (ret) {
- fprintf(stderr, "Couldn't map the block %llu\n",
- logical + offset);
- goto err;
- }
- device = multi->stripes[0].dev;
-
- if (device->fd == 0)
- goto err;
- if (*len > max_len)
- *len = max_len;
-
- ret = pread64(device->fd, data, *len, multi->stripes[0].physical);
- if (ret != *len)
- ret = -EIO;
- else
- ret = 0;
-err:
- kfree(multi);
- return ret;
-}
-
static int check_extent_csums(struct btrfs_root *root, u64 bytenr,
u64 num_bytes, unsigned long leaf_offset,
struct extent_buffer *eb) {
return 0;
}
+/*
+ * Here are the rules for FULL_BACKREF.
+ *
+ * 1) If BTRFS_HEADER_FLAG_RELOC is set then we have FULL_BACKREF set.
+ * 2) If btrfs_header_owner(buf) no longer points to buf then we have
+ * FULL_BACKREF set.
+ * 3) We cow'ed the block walking down a reloc tree. This is impossible to tell
+ * if it happened after the relocation occurred since we'll have dropped the
+ * reloc root, so it's entirely possible to have FULL_BACKREF set on buf and
+ * have no real way to know for sure.
+ *
+ * We process the blocks one root at a time, and we start from the lowest root
+ * objectid and go to the highest. So we can just lookup the owner backref for
+ * the record and if we don't find it then we know it doesn't exist and we have
+ * a FULL BACKREF.
+ *
+ * FIXME: if we ever start reclaiming root objectid's then we need to fix this
+ * assumption and simply indicate that we _think_ that the FULL BACKREF needs to
+ * be set or not and then we can check later once we've gathered all the refs.
+ */
static int calc_extent_flag(struct btrfs_root *root,
struct cache_tree *extent_cache,
struct extent_buffer *buf,
struct root_item_record *ri,
u64 *flags)
{
- int i;
- int nritems = btrfs_header_nritems(buf);
- struct btrfs_key key;
struct extent_record *rec;
struct cache_extent *cache;
- struct data_backref *dback;
struct tree_backref *tback;
- struct extent_buffer *new_buf;
u64 owner = 0;
- u64 bytenr;
- u64 offset;
- u64 ptr;
- int size;
- int ret;
- u8 level;
+
+ cache = lookup_cache_extent(extent_cache, buf->start, 1);
+ /* we have added this extent before */
+ BUG_ON(!cache);
+ rec = container_of(cache, struct extent_record, cache);
/*
* Except file/reloc tree, we can not have
*/
if (buf->start == ri->bytenr)
goto normal;
- if (btrfs_is_leaf(buf)) {
- /*
- * we are searching from original root, world
- * peace is achieved, we use normal backref.
- */
- owner = btrfs_header_owner(buf);
- if (owner == ri->objectid)
- goto normal;
- /*
- * we check every eb here, and if any of
- * eb dosen't have original root refers
- * to this eb, we set full backref flag for
- * this extent, otherwise normal backref.
- */
- for (i = 0; i < nritems; i++) {
- struct btrfs_file_extent_item *fi;
- btrfs_item_key_to_cpu(buf, &key, i);
- if (key.type != BTRFS_EXTENT_DATA_KEY)
- continue;
- fi = btrfs_item_ptr(buf, i,
- struct btrfs_file_extent_item);
- if (btrfs_file_extent_type(buf, fi) ==
- BTRFS_FILE_EXTENT_INLINE)
- continue;
- if (btrfs_file_extent_disk_bytenr(buf, fi) == 0)
- continue;
- bytenr = btrfs_file_extent_disk_bytenr(buf, fi);
- cache = lookup_cache_extent(extent_cache, bytenr, 1);
- if (!cache)
- goto full_backref;
- offset = btrfs_file_extent_offset(buf, fi);
- rec = container_of(cache, struct extent_record, cache);
- dback = find_data_backref(rec, 0, ri->objectid, owner,
- key.offset - offset, 1, bytenr, bytenr);
- if (!dback)
- goto full_backref;
- }
+ if (btrfs_header_flag(buf, BTRFS_HEADER_FLAG_RELOC))
goto full_backref;
- } else {
- level = btrfs_header_level(buf);
- for (i = 0; i < nritems; i++) {
- ptr = btrfs_node_blockptr(buf, i);
- size = btrfs_level_size(root, level);
- if (i == 0) {
- new_buf = read_tree_block(root, ptr, size, 0);
- if (!extent_buffer_uptodate(new_buf)) {
- free_extent_buffer(new_buf);
- ret = -EIO;
- return ret;
- }
- /*
- * we are searching from origin root, world
- * peace is achieved, we use normal backref.
- */
- owner = btrfs_header_owner(new_buf);
- free_extent_buffer(new_buf);
- if (owner == ri->objectid)
- goto normal;
- }
- cache = lookup_cache_extent(extent_cache, ptr, size);
- if (!cache)
- goto full_backref;
- rec = container_of(cache, struct extent_record, cache);
- tback = find_tree_backref(rec, 0, owner);
- if (!tback)
- goto full_backref;
- }
- }
+ owner = btrfs_header_owner(buf);
+ if (owner == ri->objectid)
+ goto normal;
+
+ tback = find_tree_backref(rec, 0, owner);
+ if (!tback)
+ goto full_backref;
normal:
*flags = 0;
- cache = lookup_cache_extent(extent_cache, buf->start, 1);
- /* we have added this extent before */
- BUG_ON(!cache);
- rec = container_of(cache, struct extent_record, cache);
- rec->flag_block_full_backref = 0;
+ if (rec->flag_block_full_backref != -1 &&
+ rec->flag_block_full_backref != 0)
+ rec->bad_full_backref = 1;
return 0;
full_backref:
*flags |= BTRFS_BLOCK_FLAG_FULL_BACKREF;
- cache = lookup_cache_extent(extent_cache, buf->start, 1);
- /* we have added this extent before */
- BUG_ON(!cache);
- rec = container_of(cache, struct extent_record, cache);
- rec->flag_block_full_backref = 1;
+ if (rec->flag_block_full_backref != -1 &&
+ rec->flag_block_full_backref != 1)
+ rec->bad_full_backref = 1;
return 0;
}
-static int run_next_block(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
+static int run_next_block(struct btrfs_root *root,
struct block_info *bits,
int bits_nr,
u64 *last,
struct root_item_record *ri)
{
struct extent_buffer *buf;
+ struct extent_record *rec = NULL;
u64 bytenr;
u32 size;
u64 parent;
}
cache = lookup_cache_extent(extent_cache, bytenr, size);
if (cache) {
- struct extent_record *rec;
-
rec = container_of(cache, struct extent_record, cache);
gen = rec->parent_generation;
}
nritems = btrfs_header_nritems(buf);
- /*
- * FIXME, this only works only if we don't have any full
- * backref mode.
- */
+ flags = 0;
if (!init_extent_tree) {
ret = btrfs_lookup_extent_info(NULL, root, bytenr,
btrfs_header_level(buf), 1, NULL,
&flags);
- if (ret < 0)
- goto out;
+ if (ret < 0) {
+ ret = calc_extent_flag(root, extent_cache, buf, ri, &flags);
+ if (ret < 0) {
+ fprintf(stderr, "Couldn't calc extent flags\n");
+ flags |= BTRFS_BLOCK_FLAG_FULL_BACKREF;
+ }
+ }
} else {
flags = 0;
ret = calc_extent_flag(root, extent_cache, buf, ri, &flags);
- if (ret < 0)
- goto out;
+ if (ret < 0) {
+ fprintf(stderr, "Couldn't calc extent flags\n");
+ flags |= BTRFS_BLOCK_FLAG_FULL_BACKREF;
+ }
}
if (flags & BTRFS_BLOCK_FLAG_FULL_BACKREF) {
+ if (ri != NULL &&
+ ri->objectid != BTRFS_TREE_RELOC_OBJECTID &&
+ ri->objectid == btrfs_header_owner(buf)) {
+ /*
+ * Ok we got to this block from it's original owner and
+ * we have FULL_BACKREF set. Relocation can leave
+ * converted blocks over so this is altogether possible,
+ * however it's not possible if the generation > the
+ * last snapshot, so check for this case.
+ */
+ if (!btrfs_header_flag(buf, BTRFS_HEADER_FLAG_RELOC) &&
+ btrfs_header_generation(buf) > ri->last_snapshot) {
+ flags &= ~BTRFS_BLOCK_FLAG_FULL_BACKREF;
+ rec->bad_full_backref = 1;
+ }
+ }
+ } else {
+ if (ri != NULL &&
+ (ri->objectid == BTRFS_TREE_RELOC_OBJECTID ||
+ btrfs_header_flag(buf, BTRFS_HEADER_FLAG_RELOC))) {
+ flags |= BTRFS_BLOCK_FLAG_FULL_BACKREF;
+ rec->bad_full_backref = 1;
+ }
+ }
+
+ if (flags & BTRFS_BLOCK_FLAG_FULL_BACKREF) {
+ rec->flag_block_full_backref = 1;
parent = bytenr;
owner = 0;
} else {
+ rec->flag_block_full_backref = 0;
parent = 0;
owner = btrfs_header_owner(buf);
}
- ret = check_block(trans, root, extent_cache, buf, flags);
+ ret = check_block(root, extent_cache, buf, flags);
if (ret)
goto out;
parent, tback->root, 0, 0);
fprintf(stderr, "adding new tree backref on "
"start %llu len %llu parent %llu root %llu\n",
- rec->start, rec->max_size, tback->parent, tback->root);
+ rec->start, rec->max_size, parent, tback->root);
}
if (ret)
goto fail;
return best;
}
-static int repair_ref(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *info, struct btrfs_path *path,
+static int repair_ref(struct btrfs_fs_info *info, struct btrfs_path *path,
struct data_backref *dback, struct extent_entry *entry)
{
+ struct btrfs_trans_handle *trans;
struct btrfs_root *root;
struct btrfs_file_extent_item *fi;
struct extent_buffer *leaf;
struct btrfs_key key;
u64 bytenr, bytes;
- int ret;
+ int ret, err;
key.objectid = dback->root;
key.type = BTRFS_ROOT_ITEM_KEY;
btrfs_release_path(path);
- /*
- * Have to make sure that this root gets updated when we commit the
- * transaction
- */
- record_root_in_trans(trans, root);
+ trans = btrfs_start_transaction(root, 1);
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
/*
* Ok we have the key of the file extent we want to fix, now we can cow
if (ret < 0) {
fprintf(stderr, "Error cowing down to ref [%Lu, %u, %Lu]: %d\n",
key.objectid, key.type, key.offset, ret);
- return ret;
+ goto out;
}
if (ret > 0) {
fprintf(stderr, "Well that's odd, we just found this key "
"[%Lu, %u, %Lu]\n", key.objectid, key.type,
key.offset);
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
leaf = path->nodes[0];
fi = btrfs_item_ptr(leaf, path->slots[0],
"system and send it to a btrfs developer so they can "
"complete this functionality for bytenr %Lu\n",
dback->disk_bytenr);
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
if (dback->node.broken && dback->disk_bytenr != entry->bytenr) {
"take a btrfs-image of this file system and "
"send it to a btrfs developer, ref %Lu\n",
dback->disk_bytenr);
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
offset += off_diff;
btrfs_set_file_extent_disk_bytenr(leaf, fi, entry->bytenr);
" take a btrfs-image of this file system and "
"send it to a btrfs developer, ref %Lu\n",
dback->disk_bytenr);
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
offset += dback->disk_bytenr;
else
printf("ram bytes may be wrong?\n");
btrfs_mark_buffer_dirty(leaf);
+out:
+ err = btrfs_commit_transaction(trans, root);
btrfs_release_path(path);
- return 0;
+ return ret ? ret : err;
}
-static int verify_backrefs(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *info, struct btrfs_path *path,
+static int verify_backrefs(struct btrfs_fs_info *info, struct btrfs_path *path,
struct extent_record *rec)
{
struct extent_backref *back;
dback->disk_bytenr == best->bytenr)
continue;
- ret = repair_ref(trans, info, path, dback, best);
+ ret = repair_ref(info, path, dback, best);
if (ret)
goto out;
}
return good->num_duplicates ? 0 : 1;
}
-static int delete_duplicate_records(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
+static int delete_duplicate_records(struct btrfs_root *root,
struct extent_record *rec)
{
+ struct btrfs_trans_handle *trans;
LIST_HEAD(delete_list);
struct btrfs_path *path;
struct extent_record *tmp, *good, *n;
int nr_del = 0;
- int ret = 0;
+ int ret = 0, err;
struct btrfs_key key;
path = btrfs_alloc_path();
}
root = root->fs_info->extent_root;
+ trans = btrfs_start_transaction(root, 1);
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ goto out;
+ }
+
list_for_each_entry(tmp, &delete_list, list) {
if (tmp->found_rec == 0)
continue;
if (ret) {
if (ret > 0)
ret = -EINVAL;
- goto out;
+ break;
}
ret = btrfs_del_item(trans, root, path);
if (ret)
- goto out;
+ break;
btrfs_release_path(path);
nr_del++;
}
-
+ err = btrfs_commit_transaction(trans, root);
+ if (err && !ret)
+ ret = err;
out:
while (!list_empty(&delete_list)) {
tmp = list_entry(delete_list.next, struct extent_record, list);
return ret ? ret : nr_del;
}
-static int find_possible_backrefs(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *info,
+static int find_possible_backrefs(struct btrfs_fs_info *info,
struct btrfs_path *path,
struct cache_tree *extent_cache,
struct extent_record *rec)
}
/*
+ * Record orphan data ref into corresponding root.
+ *
+ * Return 0 if the extent item contains data ref and recorded.
+ * Return 1 if the extent item contains no useful data ref
+ * On that case, it may contains only shared_dataref or metadata backref
+ * or the file extent exists(this should be handled by the extent bytenr
+ * recovery routine)
+ * Return <0 if something goes wrong.
+ */
+static int record_orphan_data_extents(struct btrfs_fs_info *fs_info,
+ struct extent_record *rec)
+{
+ struct btrfs_key key;
+ struct btrfs_root *dest_root;
+ struct extent_backref *back;
+ struct data_backref *dback;
+ struct orphan_data_extent *orphan;
+ struct btrfs_path *path;
+ int recorded_data_ref = 0;
+ int ret = 0;
+
+ if (rec->metadata)
+ return 1;
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+ list_for_each_entry(back, &rec->backrefs, list) {
+ if (back->full_backref || !back->is_data ||
+ !back->found_extent_tree)
+ continue;
+ dback = (struct data_backref *)back;
+ if (dback->found_ref)
+ continue;
+ key.objectid = dback->root;
+ key.type = BTRFS_ROOT_ITEM_KEY;
+ key.offset = (u64)-1;
+
+ dest_root = btrfs_read_fs_root(fs_info, &key);
+
+ /* For non-exist root we just skip it */
+ if (IS_ERR(dest_root) || !dest_root)
+ continue;
+
+ key.objectid = dback->owner;
+ key.type = BTRFS_EXTENT_DATA_KEY;
+ key.offset = dback->offset;
+
+ ret = btrfs_search_slot(NULL, dest_root, &key, path, 0, 0);
+ /*
+ * For ret < 0, it's OK since the fs-tree may be corrupted,
+ * we need to record it for inode/file extent rebuild.
+ * For ret > 0, we record it only for file extent rebuild.
+ * For ret == 0, the file extent exists but only bytenr
+ * mismatch, let the original bytenr fix routine to handle,
+ * don't record it.
+ */
+ if (ret == 0)
+ continue;
+ ret = 0;
+ orphan = malloc(sizeof(*orphan));
+ if (!orphan) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ INIT_LIST_HEAD(&orphan->list);
+ orphan->root = dback->root;
+ orphan->objectid = dback->owner;
+ orphan->offset = dback->offset;
+ orphan->disk_bytenr = rec->cache.start;
+ orphan->disk_len = rec->cache.size;
+ list_add(&dest_root->orphan_data_extents, &orphan->list);
+ recorded_data_ref = 1;
+ }
+out:
+ btrfs_free_path(path);
+ if (!ret)
+ return !recorded_data_ref;
+ else
+ return ret;
+}
+
+/*
* when an incorrect extent item is found, this will delete
* all of the existing entries for it and recreate them
* based on what the tree scan found.
*/
-static int fixup_extent_refs(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *info,
+static int fixup_extent_refs(struct btrfs_fs_info *info,
struct cache_tree *extent_cache,
struct extent_record *rec)
{
+ struct btrfs_trans_handle *trans = NULL;
int ret;
struct btrfs_path *path;
struct list_head *cur = rec->backrefs.next;
int allocated = 0;
u64 flags = 0;
- /*
- * remember our flags for recreating the extent.
- * FIXME, if we have cleared extent tree, we can not
- * lookup extent info in extent tree.
- */
- if (!init_extent_tree) {
- ret = btrfs_lookup_extent_info(NULL, info->extent_root,
- rec->start, rec->max_size,
- rec->metadata, NULL, &flags);
- if (ret < 0)
- return ret;
- } else {
- if (rec->flag_block_full_backref)
- flags |= BTRFS_BLOCK_FLAG_FULL_BACKREF;
- }
+ if (rec->flag_block_full_backref)
+ flags |= BTRFS_BLOCK_FLAG_FULL_BACKREF;
path = btrfs_alloc_path();
if (!path)
* them into the list if we find the backref so that
* verify_backrefs can figure out what to do.
*/
- ret = find_possible_backrefs(trans, info, path, extent_cache,
- rec);
+ ret = find_possible_backrefs(info, path, extent_cache, rec);
if (ret < 0)
goto out;
}
/* step one, make sure all of the backrefs agree */
- ret = verify_backrefs(trans, info, path, rec);
+ ret = verify_backrefs(info, path, rec);
if (ret < 0)
goto out;
+ trans = btrfs_start_transaction(info->extent_root, 1);
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ goto out;
+ }
+
/* step two, delete all the existing records */
ret = delete_extent_records(trans, info->extent_root, path,
rec->start, rec->max_size);
if (!back->found_ref)
continue;
+ rec->bad_full_backref = 0;
ret = record_extent(trans, info, path, rec, back, allocated, flags);
allocated = 1;
goto out;
}
out:
+ if (trans) {
+ int err = btrfs_commit_transaction(trans, info->extent_root);
+ if (!ret)
+ ret = err;
+ }
+
btrfs_free_path(path);
return ret;
}
+static int fixup_extent_flags(struct btrfs_fs_info *fs_info,
+ struct extent_record *rec)
+{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_root *root = fs_info->extent_root;
+ struct btrfs_path *path;
+ struct btrfs_extent_item *ei;
+ struct btrfs_key key;
+ u64 flags;
+ int ret = 0;
+
+ key.objectid = rec->start;
+ if (rec->metadata) {
+ key.type = BTRFS_METADATA_ITEM_KEY;
+ key.offset = rec->info_level;
+ } else {
+ key.type = BTRFS_EXTENT_ITEM_KEY;
+ key.offset = rec->max_size;
+ }
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ trans = btrfs_start_transaction(root, 0);
+ if (IS_ERR(trans)) {
+ btrfs_free_path(path);
+ return PTR_ERR(trans);
+ }
+
+ ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
+ if (ret < 0) {
+ btrfs_free_path(path);
+ btrfs_commit_transaction(trans, root);
+ return ret;
+ } else if (ret) {
+ fprintf(stderr, "Didn't find extent for %llu\n",
+ (unsigned long long)rec->start);
+ btrfs_free_path(path);
+ btrfs_commit_transaction(trans, root);
+ return -ENOENT;
+ }
+
+ ei = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_extent_item);
+ flags = btrfs_extent_flags(path->nodes[0], ei);
+ if (rec->flag_block_full_backref) {
+ fprintf(stderr, "setting full backref on %llu\n",
+ (unsigned long long)key.objectid);
+ flags |= BTRFS_BLOCK_FLAG_FULL_BACKREF;
+ } else {
+ fprintf(stderr, "clearing full backref on %llu\n",
+ (unsigned long long)key.objectid);
+ flags &= ~BTRFS_BLOCK_FLAG_FULL_BACKREF;
+ }
+ btrfs_set_extent_flags(path->nodes[0], ei, flags);
+ btrfs_mark_buffer_dirty(path->nodes[0]);
+ btrfs_free_path(path);
+ return btrfs_commit_transaction(trans, root);
+}
+
/* right now we only prune from the extent allocation tree */
static int prune_one_block(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *info,
return ret;
}
-static int prune_corrupt_blocks(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *info)
+static int prune_corrupt_blocks(struct btrfs_fs_info *info)
{
+ struct btrfs_trans_handle *trans = NULL;
struct cache_extent *cache;
struct btrfs_corrupt_block *corrupt;
- cache = search_cache_extent(info->corrupt_blocks, 0);
while (1) {
+ cache = search_cache_extent(info->corrupt_blocks, 0);
if (!cache)
break;
+ if (!trans) {
+ trans = btrfs_start_transaction(info->extent_root, 1);
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
+ }
corrupt = container_of(cache, struct btrfs_corrupt_block, cache);
prune_one_block(trans, info, corrupt);
- cache = next_cache_extent(cache);
+ remove_cache_extent(info->corrupt_blocks, cache);
}
+ if (trans)
+ return btrfs_commit_transaction(trans, info->extent_root);
return 0;
}
}
}
-static int check_extent_refs(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
+static int check_extent_refs(struct btrfs_root *root,
struct cache_tree *extent_cache)
{
struct extent_record *rec;
int ret = 0;
int fixed = 0;
int had_dups = 0;
+ int recorded = 0;
if (repair) {
/*
cache = search_cache_extent(extent_cache, 0);
while(cache) {
rec = container_of(cache, struct extent_record, cache);
- btrfs_pin_extent(root->fs_info,
- rec->start, rec->max_size);
+ set_extent_dirty(root->fs_info->excluded_extents,
+ rec->start,
+ rec->start + rec->max_size - 1,
+ GFP_NOFS);
cache = next_cache_extent(cache);
}
/* pin down all the corrupted blocks too */
cache = search_cache_extent(root->fs_info->corrupt_blocks, 0);
while(cache) {
- btrfs_pin_extent(root->fs_info,
- cache->start, cache->size);
+ set_extent_dirty(root->fs_info->excluded_extents,
+ cache->start,
+ cache->start + cache->size - 1,
+ GFP_NOFS);
cache = next_cache_extent(cache);
}
- prune_corrupt_blocks(trans, root->fs_info);
+ prune_corrupt_blocks(root->fs_info);
reset_cached_block_groups(root->fs_info);
}
+ reset_cached_block_groups(root->fs_info);
+
/*
* We need to delete any duplicate entries we find first otherwise we
* could mess up the extent tree when we have backrefs that actually
*/
if (process_duplicates(root, extent_cache, rec))
continue;
- ret = delete_duplicate_records(trans, root, rec);
+ ret = delete_duplicate_records(root, rec);
if (ret < 0)
return ret;
/*
return -EAGAIN;
while(1) {
+ int cur_err = 0;
+
fixed = 0;
+ recorded = 0;
cache = search_cache_extent(extent_cache, 0);
if (!cache)
break;
fprintf(stderr, "extent item %llu has multiple extent "
"items\n", (unsigned long long)rec->start);
err = 1;
+ cur_err = 1;
}
if (rec->refs != rec->extent_item_refs) {
fprintf(stderr, "extent item %llu, found %llu\n",
(unsigned long long)rec->extent_item_refs,
(unsigned long long)rec->refs);
- if (!fixed && repair) {
- ret = fixup_extent_refs(trans, root->fs_info,
+ ret = record_orphan_data_extents(root->fs_info, rec);
+ if (ret < 0)
+ goto repair_abort;
+ if (ret == 0) {
+ recorded = 1;
+ } else {
+ /*
+ * we can't use the extent to repair file
+ * extent, let the fallback method handle it.
+ */
+ if (!fixed && repair) {
+ ret = fixup_extent_refs(
+ root->fs_info,
extent_cache, rec);
- if (ret)
- goto repair_abort;
- fixed = 1;
+ if (ret)
+ goto repair_abort;
+ fixed = 1;
+ }
}
err = 1;
-
+ cur_err = 1;
}
if (all_backpointers_checked(rec, 1)) {
fprintf(stderr, "backpointer mismatch on [%llu %llu]\n",
(unsigned long long)rec->start,
(unsigned long long)rec->nr);
- if (!fixed && repair) {
- ret = fixup_extent_refs(trans, root->fs_info,
+ if (!fixed && !recorded && repair) {
+ ret = fixup_extent_refs(root->fs_info,
extent_cache, rec);
if (ret)
goto repair_abort;
fixed = 1;
}
-
+ cur_err = 1;
err = 1;
}
if (!rec->owner_ref_checked) {
fprintf(stderr, "owner ref check failed [%llu %llu]\n",
(unsigned long long)rec->start,
(unsigned long long)rec->nr);
- if (!fixed && repair) {
- ret = fixup_extent_refs(trans, root->fs_info,
+ if (!fixed && !recorded && repair) {
+ ret = fixup_extent_refs(root->fs_info,
extent_cache, rec);
if (ret)
goto repair_abort;
fixed = 1;
}
err = 1;
+ cur_err = 1;
+ }
+ if (rec->bad_full_backref) {
+ fprintf(stderr, "bad full backref, on [%llu]\n",
+ (unsigned long long)rec->start);
+ if (repair) {
+ ret = fixup_extent_flags(root->fs_info, rec);
+ if (ret)
+ goto repair_abort;
+ fixed = 1;
+ }
+ err = 1;
+ cur_err = 1;
+ }
+ /*
+ * Although it's not a extent ref's problem, we reuse this
+ * routine for error reporting.
+ * No repair function yet.
+ */
+ if (rec->crossing_stripes) {
+ fprintf(stderr,
+ "bad metadata [%llu, %llu) crossing stripe boundary\n",
+ rec->start, rec->start + rec->max_size);
+ err = 1;
+ cur_err = 1;
}
remove_cache_extent(extent_cache, cache);
free_all_extent_backrefs(rec);
+ if (!init_extent_tree && repair && (!cur_err || fixed))
+ clear_extent_dirty(root->fs_info->excluded_extents,
+ rec->start,
+ rec->start + rec->max_size - 1,
+ GFP_NOFS);
free(rec);
}
repair_abort:
fprintf(stderr, "failed to repair damaged filesystem, aborting\n");
exit(1);
} else if (!ret) {
+ struct btrfs_trans_handle *trans;
+
+ root = root->fs_info->extent_root;
+ trans = btrfs_start_transaction(root, 1);
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ goto repair_abort;
+ }
+
btrfs_fix_block_accounting(trans, root);
+ ret = btrfs_commit_transaction(trans, root);
+ if (ret)
+ goto repair_abort;
}
if (err)
fprintf(stderr, "repaired damaged extent references\n");
u64 devid;
u64 offset;
u64 length;
+ int metadump_v2 = 0;
int i;
int ret = 0;
cache);
if (chunk_rec->length != block_group_rec->offset ||
chunk_rec->offset != block_group_rec->objectid ||
- chunk_rec->type_flags != block_group_rec->flags) {
+ (!metadump_v2 &&
+ chunk_rec->type_flags != block_group_rec->flags)) {
if (!silent)
fprintf(stderr,
"Chunk[%llu, %u, %llu]: length(%llu), offset(%llu), type(%llu) mismatch with block group[%llu, %u, %llu]: offset(%llu), objectid(%llu), flags(%llu)\n",
ret = 1;
}
+ if (metadump_v2)
+ return ret;
+
length = calc_stripe_length(chunk_rec->type_flags, chunk_rec->length,
chunk_rec->num_stripes);
for (i = 0; i < chunk_rec->num_stripes; ++i) {
cache);
err = check_chunk_refs(chunk_rec, block_group_cache,
dev_extent_cache, silent);
- if (err)
+ if (err < 0)
ret = err;
if (err == 0 && good)
list_add_tail(&chunk_rec->list, good);
}
static int add_root_item_to_list(struct list_head *head,
- u64 objectid, u64 bytenr,
+ u64 objectid, u64 bytenr, u64 last_snapshot,
u8 level, u8 drop_level,
int level_size, struct btrfs_key *drop_key)
{
ri_rec->level = level;
ri_rec->level_size = level_size;
ri_rec->drop_level = drop_level;
+ ri_rec->last_snapshot = last_snapshot;
if (drop_key)
memcpy(&ri_rec->drop_key, drop_key, sizeof(*drop_key));
list_add_tail(&ri_rec->list, head);
return 0;
}
+static void free_root_item_list(struct list_head *list)
+{
+ struct root_item_record *ri_rec;
+
+ while (!list_empty(list)) {
+ ri_rec = list_first_entry(list, struct root_item_record,
+ list);
+ list_del_init(&ri_rec->list);
+ free(ri_rec);
+ }
+}
+
static int deal_root_from_list(struct list_head *list,
- struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct block_info *bits,
int bits_nr,
* one by one, otherwise we deal with node firstly which
* can maximize readahead.
*/
- if (!init_extent_tree && !rec->drop_level)
- goto skip;
while (1) {
- ret = run_next_block(trans, root, bits, bits_nr, &last,
- pending, seen, reada,
- nodes, extent_cache,
- chunk_cache, dev_cache,
- block_group_cache,
+ ret = run_next_block(root, bits, bits_nr, &last,
+ pending, seen, reada, nodes,
+ extent_cache, chunk_cache,
+ dev_cache, block_group_cache,
dev_extent_cache, rec);
if (ret != 0)
break;
}
-skip:
free_extent_buffer(buf);
list_del(&rec->list);
free(rec);
+ if (ret < 0)
+ break;
}
while (ret >= 0) {
- ret = run_next_block(trans, root, bits, bits_nr, &last,
- pending, seen, reada,
- nodes, extent_cache,
- chunk_cache, dev_cache,
- block_group_cache,
+ ret = run_next_block(root, bits, bits_nr, &last, pending, seen,
+ reada, nodes, extent_cache, chunk_cache,
+ dev_cache, block_group_cache,
dev_extent_cache, NULL);
if (ret != 0) {
if (ret > 0)
struct cache_tree pending;
struct cache_tree reada;
struct cache_tree nodes;
+ struct extent_io_tree excluded_extents;
struct cache_tree corrupt_blocks;
struct btrfs_path path;
struct btrfs_key key;
struct block_info *bits;
int bits_nr;
struct extent_buffer *leaf;
- struct btrfs_trans_handle *trans = NULL;
int slot;
struct btrfs_root_item ri;
struct list_head dropping_trees;
cache_tree_init(&nodes);
cache_tree_init(&reada);
cache_tree_init(&corrupt_blocks);
+ extent_io_tree_init(&excluded_extents);
INIT_LIST_HEAD(&dropping_trees);
INIT_LIST_HEAD(&normal_trees);
if (repair) {
- trans = btrfs_start_transaction(root, 1);
- if (IS_ERR(trans)) {
- fprintf(stderr, "Error starting transaction\n");
- return PTR_ERR(trans);
- }
+ root->fs_info->excluded_extents = &excluded_extents;
root->fs_info->fsck_extent_cache = &extent_cache;
root->fs_info->free_extent_hook = free_extent_hook;
root->fs_info->corrupt_blocks = &corrupt_blocks;
root1 = root->fs_info->tree_root;
level = btrfs_header_level(root1->node);
ret = add_root_item_to_list(&normal_trees, root1->root_key.objectid,
- root1->node->start, level, 0,
+ root1->node->start, 0, level, 0,
btrfs_level_size(root1, level), NULL);
if (ret < 0)
goto out;
root1 = root->fs_info->chunk_root;
level = btrfs_header_level(root1->node);
ret = add_root_item_to_list(&normal_trees, root1->root_key.objectid,
- root1->node->start, level, 0,
+ root1->node->start, 0, level, 0,
btrfs_level_size(root1, level), NULL);
if (ret < 0)
goto out;
btrfs_item_key_to_cpu(leaf, &found_key, path.slots[0]);
if (btrfs_key_type(&found_key) == BTRFS_ROOT_ITEM_KEY) {
unsigned long offset;
+ u64 last_snapshot;
offset = btrfs_item_ptr_offset(leaf, path.slots[0]);
read_extent_buffer(leaf, &ri, offset, sizeof(ri));
+ last_snapshot = btrfs_root_last_snapshot(&ri);
if (btrfs_disk_key_objectid(&ri.drop_progress) == 0) {
level = btrfs_root_level(&ri);
level_size = btrfs_level_size(root, level);
ret = add_root_item_to_list(&normal_trees,
found_key.objectid,
- btrfs_root_bytenr(&ri), level,
+ btrfs_root_bytenr(&ri),
+ last_snapshot, level,
0, level_size, NULL);
if (ret < 0)
goto out;
ret = add_root_item_to_list(&dropping_trees,
objectid,
btrfs_root_bytenr(&ri),
- level, ri.drop_level,
+ last_snapshot, level,
+ ri.drop_level,
level_size, &found_key);
if (ret < 0)
goto out;
path.slots[0]++;
}
btrfs_release_path(&path);
- ret = deal_root_from_list(&normal_trees, trans, root,
- bits, bits_nr, &pending, &seen,
- &reada, &nodes, &extent_cache,
+
+ /*
+ * check_block can return -EAGAIN if it fixes something, please keep
+ * this in mind when dealing with return values from these functions, if
+ * we get -EAGAIN we want to fall through and restart the loop.
+ */
+ ret = deal_root_from_list(&normal_trees, root, bits, bits_nr, &pending,
+ &seen, &reada, &nodes, &extent_cache,
&chunk_cache, &dev_cache, &block_group_cache,
&dev_extent_cache);
- if (ret < 0)
+ if (ret < 0) {
+ if (ret == -EAGAIN)
+ goto loop;
goto out;
- ret = deal_root_from_list(&dropping_trees, trans, root,
- bits, bits_nr, &pending, &seen,
- &reada, &nodes, &extent_cache,
- &chunk_cache, &dev_cache, &block_group_cache,
- &dev_extent_cache);
- if (ret < 0)
+ }
+ ret = deal_root_from_list(&dropping_trees, root, bits, bits_nr,
+ &pending, &seen, &reada, &nodes,
+ &extent_cache, &chunk_cache, &dev_cache,
+ &block_group_cache, &dev_extent_cache);
+ if (ret < 0) {
+ if (ret == -EAGAIN)
+ goto loop;
goto out;
- if (ret >= 0)
- ret = check_extent_refs(trans, root, &extent_cache);
- if (ret == -EAGAIN) {
- ret = btrfs_commit_transaction(trans, root);
- if (ret)
- goto out;
-
- trans = btrfs_start_transaction(root, 1);
- if (IS_ERR(trans)) {
- ret = PTR_ERR(trans);
- goto out;
- }
-
- free_corrupt_blocks_tree(root->fs_info->corrupt_blocks);
- free_extent_cache_tree(&seen);
- free_extent_cache_tree(&pending);
- free_extent_cache_tree(&reada);
- free_extent_cache_tree(&nodes);
- free_chunk_cache_tree(&chunk_cache);
- free_block_group_tree(&block_group_cache);
- free_device_cache_tree(&dev_cache);
- free_device_extent_tree(&dev_extent_cache);
- free_extent_record_cache(root->fs_info, &extent_cache);
- goto again;
}
err = check_chunks(&chunk_cache, &block_group_cache,
&dev_extent_cache, NULL, NULL, NULL, 0);
- if (err && !ret)
- ret = err;
+ if (err) {
+ if (err == -EAGAIN)
+ goto loop;
+ if (!ret)
+ ret = err;
+ }
+
+ ret = check_extent_refs(root, &extent_cache);
+ if (ret < 0) {
+ if (ret == -EAGAIN)
+ goto loop;
+ goto out;
+ }
err = check_devices(&dev_cache, &dev_extent_cache);
if (err && !ret)
ret = err;
out:
- if (trans) {
- err = btrfs_commit_transaction(trans, root);
- if (!ret)
- ret = err;
- }
if (repair) {
free_corrupt_blocks_tree(root->fs_info->corrupt_blocks);
+ extent_io_tree_cleanup(&excluded_extents);
root->fs_info->fsck_extent_cache = NULL;
root->fs_info->free_extent_hook = NULL;
root->fs_info->corrupt_blocks = NULL;
+ root->fs_info->excluded_extents = NULL;
}
free(bits);
free_chunk_cache_tree(&chunk_cache);
free_extent_cache_tree(&reada);
free_extent_cache_tree(&nodes);
return ret;
+loop:
+ free_corrupt_blocks_tree(root->fs_info->corrupt_blocks);
+ free_extent_cache_tree(&seen);
+ free_extent_cache_tree(&pending);
+ free_extent_cache_tree(&reada);
+ free_extent_cache_tree(&nodes);
+ free_chunk_cache_tree(&chunk_cache);
+ free_block_group_tree(&block_group_cache);
+ free_device_cache_tree(&dev_cache);
+ free_device_extent_tree(&dev_extent_cache);
+ free_extent_record_cache(root->fs_info, &extent_cache);
+ free_root_item_list(&normal_trees);
+ free_root_item_list(&dropping_trees);
+ extent_io_tree_cleanup(&excluded_extents);
+ goto again;
}
static int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans,
*/
tmp = read_tree_block(fs_info->extent_root, bytenr,
leafsize, 0);
- if (!tmp) {
+ if (!extent_buffer_uptodate(tmp)) {
fprintf(stderr, "Error reading root block\n");
return -EIO;
}
tmp = read_tree_block(fs_info->extent_root, bytenr,
leafsize, 0);
- if (!tmp) {
+ if (!extent_buffer_uptodate(tmp)) {
fprintf(stderr, "Error reading tree block\n");
return -EIO;
}
root = btrfs_read_fs_root(fs_info, &key);
if (IS_ERR(root)) {
fprintf(stderr, "Error reading data reloc tree\n");
- return PTR_ERR(root);
+ ret = PTR_ERR(root);
+ goto out;
}
record_root_in_trans(trans, root);
ret = btrfs_fsck_reinit_root(trans, root, 0);
return ret;
}
-static int fill_csum_tree(struct btrfs_trans_handle *trans,
- struct btrfs_root *csum_root)
+static int fill_csum_tree_from_one_fs_root(struct btrfs_trans_handle *trans,
+ struct btrfs_root *csum_root,
+ struct btrfs_root *cur_root)
+{
+ struct btrfs_path *path;
+ struct btrfs_key key;
+ struct extent_buffer *node;
+ struct btrfs_file_extent_item *fi;
+ char *buf = NULL;
+ u64 start = 0;
+ u64 len = 0;
+ int slot = 0;
+ int ret = 0;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+ buf = malloc(cur_root->fs_info->csum_root->sectorsize);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ key.objectid = 0;
+ key.offset = 0;
+ key.type = 0;
+
+ ret = btrfs_search_slot(NULL, cur_root, &key, path, 0, 0);
+ if (ret < 0)
+ goto out;
+ /* Iterate all regular file extents and fill its csum */
+ while (1) {
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+
+ if (key.type != BTRFS_EXTENT_DATA_KEY)
+ goto next;
+ node = path->nodes[0];
+ slot = path->slots[0];
+ fi = btrfs_item_ptr(node, slot, struct btrfs_file_extent_item);
+ if (btrfs_file_extent_type(node, fi) != BTRFS_FILE_EXTENT_REG)
+ goto next;
+ start = btrfs_file_extent_disk_bytenr(node, fi);
+ len = btrfs_file_extent_disk_num_bytes(node, fi);
+
+ ret = populate_csum(trans, csum_root, buf, start, len);
+ if (ret == -EEXIST)
+ ret = 0;
+ if (ret < 0)
+ goto out;
+next:
+ /*
+ * TODO: if next leaf is corrupted, jump to nearest next valid
+ * leaf.
+ */
+ ret = btrfs_next_item(cur_root, path);
+ if (ret < 0)
+ goto out;
+ if (ret > 0) {
+ ret = 0;
+ goto out;
+ }
+ }
+
+out:
+ btrfs_free_path(path);
+ free(buf);
+ return ret;
+}
+
+static int fill_csum_tree_from_fs(struct btrfs_trans_handle *trans,
+ struct btrfs_root *csum_root)
+{
+ struct btrfs_fs_info *fs_info = csum_root->fs_info;
+ struct btrfs_path *path;
+ struct btrfs_root *tree_root = fs_info->tree_root;
+ struct btrfs_root *cur_root;
+ struct extent_buffer *node;
+ struct btrfs_key key;
+ int slot = 0;
+ int ret = 0;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ key.objectid = BTRFS_FS_TREE_OBJECTID;
+ key.offset = 0;
+ key.type = BTRFS_ROOT_ITEM_KEY;
+
+ ret = btrfs_search_slot(NULL, tree_root, &key, path, 0, 0);
+ if (ret < 0)
+ goto out;
+ if (ret > 0) {
+ ret = -ENOENT;
+ goto out;
+ }
+
+ while (1) {
+ node = path->nodes[0];
+ slot = path->slots[0];
+ btrfs_item_key_to_cpu(node, &key, slot);
+ if (key.objectid > BTRFS_LAST_FREE_OBJECTID)
+ goto out;
+ if (key.type != BTRFS_ROOT_ITEM_KEY)
+ goto next;
+ if (!is_fstree(key.objectid))
+ goto next;
+ key.offset = (u64)-1;
+
+ cur_root = btrfs_read_fs_root(fs_info, &key);
+ if (IS_ERR(cur_root) || !cur_root) {
+ fprintf(stderr, "Fail to read fs/subvol tree: %lld\n",
+ key.objectid);
+ goto out;
+ }
+ ret = fill_csum_tree_from_one_fs_root(trans, csum_root,
+ cur_root);
+ if (ret < 0)
+ goto out;
+next:
+ ret = btrfs_next_item(tree_root, path);
+ if (ret > 0) {
+ ret = 0;
+ goto out;
+ }
+ if (ret < 0)
+ goto out;
+ }
+
+out:
+ btrfs_free_path(path);
+ return ret;
+}
+
+static int fill_csum_tree_from_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_root *csum_root)
{
struct btrfs_root *extent_root = csum_root->fs_info->extent_root;
struct btrfs_path *path;
return ret;
}
+/*
+ * Recalculate the csum and put it into the csum tree.
+ *
+ * Extent tree init will wipe out all the extent info, so in that case, we
+ * can't depend on extent tree, but use fs tree. If search_fs_tree is set, we
+ * will use fs/subvol trees to init the csum tree.
+ */
+static int fill_csum_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_root *csum_root,
+ int search_fs_tree)
+{
+ if (search_fs_tree)
+ return fill_csum_tree_from_fs(trans, csum_root);
+ else
+ return fill_csum_tree_from_extent(trans, csum_root);
+}
+
struct root_item_info {
/* level of the root */
u8 level;
struct root_item_info *rii;
entry = first_cache_extent(roots_info_cache);
+ if (!entry)
+ break;
remove_cache_extent(roots_info_cache, entry);
rii = container_of(entry, struct root_item_info, cache_extent);
free(rii);
if (found_key.type != BTRFS_ROOT_ITEM_KEY)
goto next;
+ if (found_key.objectid == BTRFS_TREE_RELOC_OBJECTID)
+ goto next;
ret = maybe_repair_root_item(info, path, &found_key,
trans ? 0 : 1);
ret = 0;
out:
free_roots_info_cache();
- if (path)
- btrfs_free_path(path);
+ btrfs_free_path(path);
+ if (trans)
+ btrfs_commit_transaction(trans, info->tree_root);
if (ret < 0)
return ret;
return bad_roots;
}
-static struct option long_options[] = {
- { "super", 1, NULL, 's' },
- { "repair", 0, NULL, 0 },
- { "init-csum-tree", 0, NULL, 0 },
- { "init-extent-tree", 0, NULL, 0 },
- { "check-data-csum", 0, NULL, 0 },
- { "backup", 0, NULL, 0 },
- { "subvol-extents", 1, NULL, 'E' },
- { "qgroup-report", 0, NULL, 'Q' },
- { "tree-root", 1, NULL, 'r' },
- { NULL, 0, NULL, 0}
-};
-
const char * const cmd_check_usage[] = {
"btrfs check [options] <device>",
"Check an unmounted btrfs filesystem.",
char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
int ret;
u64 num;
- int option_index = 0;
int init_csum_tree = 0;
+ int readonly = 0;
int qgroup_report = 0;
enum btrfs_open_ctree_flags ctree_flags = OPEN_CTREE_EXCLUSIVE;
while(1) {
int c;
- c = getopt_long(argc, argv, "as:br:", long_options,
- &option_index);
+ enum { OPT_REPAIR = 257, OPT_INIT_CSUM, OPT_INIT_EXTENT,
+ OPT_CHECK_CSUM, OPT_READONLY };
+ static const struct option long_options[] = {
+ { "super", required_argument, NULL, 's' },
+ { "repair", no_argument, NULL, OPT_REPAIR },
+ { "readonly", no_argument, NULL, OPT_READONLY },
+ { "init-csum-tree", no_argument, NULL, OPT_INIT_CSUM },
+ { "init-extent-tree", no_argument, NULL, OPT_INIT_EXTENT },
+ { "check-data-csum", no_argument, NULL, OPT_CHECK_CSUM },
+ { "backup", no_argument, NULL, 'b' },
+ { "subvol-extents", required_argument, NULL, 'E' },
+ { "qgroup-report", no_argument, NULL, 'Q' },
+ { "tree-root", required_argument, NULL, 'r' },
+ { NULL, 0, NULL, 0}
+ };
+
+ c = getopt_long(argc, argv, "as:br:", long_options, NULL);
if (c < 0)
break;
switch(c) {
case '?':
case 'h':
usage(cmd_check_usage);
- }
- if (option_index == 1) {
- printf("enabling repair mode\n");
- repair = 1;
- ctree_flags |= OPEN_CTREE_WRITES;
- } else if (option_index == 2) {
- printf("Creating a new CRC tree\n");
- init_csum_tree = 1;
- repair = 1;
- ctree_flags |= OPEN_CTREE_WRITES;
- } else if (option_index == 3) {
- init_extent_tree = 1;
- ctree_flags |= (OPEN_CTREE_WRITES |
- OPEN_CTREE_NO_BLOCK_GROUPS);
- repair = 1;
- } else if (option_index == 4) {
- check_data_csum = 1;
+ case OPT_REPAIR:
+ printf("enabling repair mode\n");
+ repair = 1;
+ ctree_flags |= OPEN_CTREE_WRITES;
+ break;
+ case OPT_READONLY:
+ readonly = 1;
+ break;
+ case OPT_INIT_CSUM:
+ printf("Creating a new CRC tree\n");
+ init_csum_tree = 1;
+ repair = 1;
+ ctree_flags |= OPEN_CTREE_WRITES;
+ break;
+ case OPT_INIT_EXTENT:
+ init_extent_tree = 1;
+ ctree_flags |= (OPEN_CTREE_WRITES |
+ OPEN_CTREE_NO_BLOCK_GROUPS);
+ repair = 1;
+ break;
+ case OPT_CHECK_CSUM:
+ check_data_csum = 1;
+ break;
}
}
argc = argc - optind;
if (check_argc_exact(argc, 1))
usage(cmd_check_usage);
+ /* This check is the only reason for --readonly to exist */
+ if (readonly && repair) {
+ fprintf(stderr, "Repair options are not compatible with --readonly\n");
+ exit(1);
+ }
+
radix_tree_init();
cache_tree_init(&root_cache);
root = info->fs_root;
- ret = repair_root_items(info);
- if (ret < 0)
- goto close_out;
- if (repair) {
- fprintf(stderr, "Fixed %d roots.\n", ret);
- ret = 0;
- } else if (ret > 0) {
- fprintf(stderr,
- "Found %d roots with an outdated root item.\n",
- ret);
- fprintf(stderr,
- "Please run a filesystem check with the option --repair to fix them.\n");
- ret = 1;
- goto close_out;
- }
-
/*
* repair mode will force us to commit transaction which
* will make us fail to load log tree when mounting.
goto close_out;
}
- ret = fill_csum_tree(trans, info->csum_root);
+ ret = fill_csum_tree(trans, info->csum_root,
+ init_extent_tree);
if (ret) {
fprintf(stderr, "crc refilling failed\n");
return -EIO;
if (ret)
fprintf(stderr, "Errors found in extent allocation tree or chunk allocation\n");
+ ret = repair_root_items(info);
+ if (ret < 0)
+ goto close_out;
+ if (repair) {
+ fprintf(stderr, "Fixed %d roots.\n", ret);
+ ret = 0;
+ } else if (ret > 0) {
+ fprintf(stderr,
+ "Found %d roots with an outdated root item.\n",
+ ret);
+ fprintf(stderr,
+ "Please run a filesystem check with the option --repair to fix them.\n");
+ ret = 1;
+ goto close_out;
+ }
+
fprintf(stderr, "checking free space cache\n");
ret = check_space_cache(root);
if (ret)
printf("file data blocks allocated: %llu\n referenced %llu\n",
(unsigned long long)data_bytes_allocated,
(unsigned long long)data_bytes_referenced);
- printf("%s\n", BTRFS_BUILD_VERSION);
+ printf("%s\n", PACKAGE_STRING);
free_root_recs_tree(&root_cache);
close_out:
close_ctree(root);
+ btrfs_close_all_devices();
err_out:
return ret;
}
projects / platform / upstream / btrfs-progs.git / blobdiff