| Message ID | 20181127023315.28176-2-wqu@suse.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | btrfs-progs: image: Fix error when restoring multi-disk image to single disk | expand |
On 27.11.18 г. 4:33 ч., Qu Wenruo wrote: > Current fixup_devices() will only remove DEV_ITEMs and reset DEV_ITEM > size. > Later we need to do more fixup works, so change the name to > fixup_chunks_and_devices() and refactor the original device size fixup > to fixup_device_size(). > > Signed-off-by: Qu Wenruo <wqu@suse.com> > --- > image/main.c | 52 ++++++++++++++++++++++++++++++++++++---------------- > 1 file changed, 36 insertions(+), 16 deletions(-) > > diff --git a/image/main.c b/image/main.c > index c680ab19de6c..36b5c95ea146 100644 > --- a/image/main.c > +++ b/image/main.c > @@ -2084,28 +2084,19 @@ static void remap_overlapping_chunks(struct mdrestore_struct *mdres) > } > } > > -static int fixup_devices(struct btrfs_fs_info *fs_info, > - struct mdrestore_struct *mdres, off_t dev_size) > +static int fixup_device_size(struct btrfs_trans_handle *trans, > + struct btrfs_fs_info *fs_info, trans already has a handle to the fs_info so you can drop it from the param list. > + struct mdrestore_struct *mdres, > + off_t dev_size) > { > - struct btrfs_trans_handle *trans; > struct btrfs_dev_item *dev_item; > struct btrfs_path path; > - struct extent_buffer *leaf; > struct btrfs_root *root = fs_info->chunk_root; > struct btrfs_key key; > + struct extent_buffer *leaf; > u64 devid, cur_devid; > int ret; > > - if (btrfs_super_log_root(fs_info->super_copy)) { > - warning( > - "log tree detected, its generation will not match superblock"); > - } > - trans = btrfs_start_transaction(fs_info->tree_root, 1); > - if (IS_ERR(trans)) { > - error("cannot starting transaction %ld", PTR_ERR(trans)); > - return PTR_ERR(trans); > - } > - > dev_item = &fs_info->super_copy->dev_item; > > devid = btrfs_stack_device_id(dev_item); > @@ -2123,7 +2114,7 @@ again: > ret = btrfs_search_slot(trans, root, &key, &path, -1, 1); > if (ret < 0) { > error("search failed: %d", ret); > - exit(1); > + return ret; > } > > while (1) { > @@ -2170,12 +2161,41 @@ again: > } > > btrfs_release_path(&path); > + return 0; > +} > + > +static int fixup_chunks_and_devices(struct btrfs_fs_info *fs_info, > + struct mdrestore_struct *mdres, off_t dev_size) > +{ > + struct btrfs_trans_handle *trans; > + int ret; > + > + if (btrfs_super_log_root(fs_info->super_copy)) { > + warning( > + "log tree detected, its generation will not match superblock"); > + } > + trans = btrfs_start_transaction(fs_info->tree_root, 1); > + if (IS_ERR(trans)) { > + error("cannot starting transaction %ld", PTR_ERR(trans)); > + return PTR_ERR(trans); > + } > + > + ret = fixup_device_size(trans, fs_info, mdres, dev_size); > + if (ret < 0) > + goto error; > + > ret = btrfs_commit_transaction(trans, fs_info->tree_root); > if (ret) { > error("unable to commit transaction: %d", ret); > return ret; > } > return 0; > +error: > + error( > +"failed to fix chunks and devices mapping, the fs may not be mountable: %s", > + strerror(-ret)); > + btrfs_abort_transaction(trans, ret); > + return ret; > } > > static int restore_metadump(const char *input, FILE *out, int old_restore, > @@ -2282,7 +2302,7 @@ static int restore_metadump(const char *input, FILE *out, int old_restore, > return 1; > } > > - ret = fixup_devices(info, &mdrestore, st.st_size); > + ret = fixup_chunks_and_devices(info, &mdrestore, st.st_size); > close_ctree(info->chunk_root); > if (ret) > goto out; >
On 2018/11/27 下午3:13, Nikolay Borisov wrote: > > > On 27.11.18 г. 4:33 ч., Qu Wenruo wrote: >> Current fixup_devices() will only remove DEV_ITEMs and reset DEV_ITEM >> size. >> Later we need to do more fixup works, so change the name to >> fixup_chunks_and_devices() and refactor the original device size fixup >> to fixup_device_size(). >> >> Signed-off-by: Qu Wenruo <wqu@suse.com> >> --- >> image/main.c | 52 ++++++++++++++++++++++++++++++++++++---------------- >> 1 file changed, 36 insertions(+), 16 deletions(-) >> >> diff --git a/image/main.c b/image/main.c >> index c680ab19de6c..36b5c95ea146 100644 >> --- a/image/main.c >> +++ b/image/main.c >> @@ -2084,28 +2084,19 @@ static void remap_overlapping_chunks(struct mdrestore_struct *mdres) >> } >> } >> >> -static int fixup_devices(struct btrfs_fs_info *fs_info, >> - struct mdrestore_struct *mdres, off_t dev_size) >> +static int fixup_device_size(struct btrfs_trans_handle *trans, >> + struct btrfs_fs_info *fs_info, > > trans already has a handle to the fs_info so you can drop it from the > param list. Indeed! My bad habbit of trans then fs_info definitely needs to be corrected. Thanks, Qu > >> + struct mdrestore_struct *mdres, >> + off_t dev_size) >> { >> - struct btrfs_trans_handle *trans; >> struct btrfs_dev_item *dev_item; >> struct btrfs_path path; >> - struct extent_buffer *leaf; >> struct btrfs_root *root = fs_info->chunk_root; >> struct btrfs_key key; >> + struct extent_buffer *leaf; >> u64 devid, cur_devid; >> int ret; >> >> - if (btrfs_super_log_root(fs_info->super_copy)) { >> - warning( >> - "log tree detected, its generation will not match superblock"); >> - } >> - trans = btrfs_start_transaction(fs_info->tree_root, 1); >> - if (IS_ERR(trans)) { >> - error("cannot starting transaction %ld", PTR_ERR(trans)); >> - return PTR_ERR(trans); >> - } >> - >> dev_item = &fs_info->super_copy->dev_item; >> >> devid = btrfs_stack_device_id(dev_item); >> @@ -2123,7 +2114,7 @@ again: >> ret = btrfs_search_slot(trans, root, &key, &path, -1, 1); >> if (ret < 0) { >> error("search failed: %d", ret); >> - exit(1); >> + return ret; >> } >> >> while (1) { >> @@ -2170,12 +2161,41 @@ again: >> } >> >> btrfs_release_path(&path); >> + return 0; >> +} >> + >> +static int fixup_chunks_and_devices(struct btrfs_fs_info *fs_info, >> + struct mdrestore_struct *mdres, off_t dev_size) >> +{ >> + struct btrfs_trans_handle *trans; >> + int ret; >> + >> + if (btrfs_super_log_root(fs_info->super_copy)) { >> + warning( >> + "log tree detected, its generation will not match superblock"); >> + } >> + trans = btrfs_start_transaction(fs_info->tree_root, 1); >> + if (IS_ERR(trans)) { >> + error("cannot starting transaction %ld", PTR_ERR(trans)); >> + return PTR_ERR(trans); >> + } >> + >> + ret = fixup_device_size(trans, fs_info, mdres, dev_size); >> + if (ret < 0) >> + goto error; >> + >> ret = btrfs_commit_transaction(trans, fs_info->tree_root); >> if (ret) { >> error("unable to commit transaction: %d", ret); >> return ret; >> } >> return 0; >> +error: >> + error( >> +"failed to fix chunks and devices mapping, the fs may not be mountable: %s", >> + strerror(-ret)); >> + btrfs_abort_transaction(trans, ret); >> + return ret; >> } >> >> static int restore_metadump(const char *input, FILE *out, int old_restore, >> @@ -2282,7 +2302,7 @@ static int restore_metadump(const char *input, FILE *out, int old_restore, >> return 1; >> } >> >> - ret = fixup_devices(info, &mdrestore, st.st_size); >> + ret = fixup_chunks_and_devices(info, &mdrestore, st.st_size); >> close_ctree(info->chunk_root); >> if (ret) >> goto out; >>
diff --git a/image/main.c b/image/main.c index c680ab19de6c..36b5c95ea146 100644 --- a/image/main.c +++ b/image/main.c @@ -2084,28 +2084,19 @@ static void remap_overlapping_chunks(struct mdrestore_struct *mdres) } } -static int fixup_devices(struct btrfs_fs_info *fs_info, - struct mdrestore_struct *mdres, off_t dev_size) +static int fixup_device_size(struct btrfs_trans_handle *trans, + struct btrfs_fs_info *fs_info, + struct mdrestore_struct *mdres, + off_t dev_size) { - struct btrfs_trans_handle *trans; struct btrfs_dev_item *dev_item; struct btrfs_path path; - struct extent_buffer *leaf; struct btrfs_root *root = fs_info->chunk_root; struct btrfs_key key; + struct extent_buffer *leaf; u64 devid, cur_devid; int ret; - if (btrfs_super_log_root(fs_info->super_copy)) { - warning( - "log tree detected, its generation will not match superblock"); - } - trans = btrfs_start_transaction(fs_info->tree_root, 1); - if (IS_ERR(trans)) { - error("cannot starting transaction %ld", PTR_ERR(trans)); - return PTR_ERR(trans); - } - dev_item = &fs_info->super_copy->dev_item; devid = btrfs_stack_device_id(dev_item); @@ -2123,7 +2114,7 @@ again: ret = btrfs_search_slot(trans, root, &key, &path, -1, 1); if (ret < 0) { error("search failed: %d", ret); - exit(1); + return ret; } while (1) { @@ -2170,12 +2161,41 @@ again: } btrfs_release_path(&path); + return 0; +} + +static int fixup_chunks_and_devices(struct btrfs_fs_info *fs_info, + struct mdrestore_struct *mdres, off_t dev_size) +{ + struct btrfs_trans_handle *trans; + int ret; + + if (btrfs_super_log_root(fs_info->super_copy)) { + warning( + "log tree detected, its generation will not match superblock"); + } + trans = btrfs_start_transaction(fs_info->tree_root, 1); + if (IS_ERR(trans)) { + error("cannot starting transaction %ld", PTR_ERR(trans)); + return PTR_ERR(trans); + } + + ret = fixup_device_size(trans, fs_info, mdres, dev_size); + if (ret < 0) + goto error; + ret = btrfs_commit_transaction(trans, fs_info->tree_root); if (ret) { error("unable to commit transaction: %d", ret); return ret; } return 0; +error: + error( +"failed to fix chunks and devices mapping, the fs may not be mountable: %s", + strerror(-ret)); + btrfs_abort_transaction(trans, ret); + return ret; } static int restore_metadump(const char *input, FILE *out, int old_restore, @@ -2282,7 +2302,7 @@ static int restore_metadump(const char *input, FILE *out, int old_restore, return 1; } - ret = fixup_devices(info, &mdrestore, st.st_size); + ret = fixup_chunks_and_devices(info, &mdrestore, st.st_size); close_ctree(info->chunk_root); if (ret) goto out;
Current fixup_devices() will only remove DEV_ITEMs and reset DEV_ITEM size. Later we need to do more fixup works, so change the name to fixup_chunks_and_devices() and refactor the original device size fixup to fixup_device_size(). Signed-off-by: Qu Wenruo <wqu@suse.com> --- image/main.c | 52 ++++++++++++++++++++++++++++++++++++---------------- 1 file changed, 36 insertions(+), 16 deletions(-)