add to the list > Helo, > > I have sent a patch for this before: > > https://patchwork.kernel.org/patch/2828820/ > > Thanks, > Wang > >> Commit 615f2867 (Btrfs-progs: cleanup similar code in open_ctree_* >> and close_ctree) introduced a regression in btrfs-convert. >> >> open_ctree takes a sb_bytenr argument to specify where to find the >> superblock. Under normal conditions, this will be at BTRFS_SUPER_INFO_OFFSET, >> and that commit assumed as much under all conditions. >> >> make_btrfs allows the caller to specify which blocks to use for >> certain blocks (including the superblock) and this is used by btrfs-convert >> to avoid overwriting the source file system's superblock until the >> conversion is complete. >> >> When btrfs-convert goes to open the newly initialized file system, it >> fails with: "No valid btrfs found" since its superblock wasn't written >> to the normal location. >> >> This patch restores the passing down of super_bytesnr to >> btrfs_scan_one_device. >> >> Signed-off-by: Jeff Mahoney <je...@suse.com> >> --- >> btrfs-find-root.c | 2 +- >> cmds-chunk.c | 2 +- >> disk-io.c | 10 +++++++--- >> disk-io.h | 3 ++- >> 4 files changed, 11 insertions(+), 6 deletions(-) >> >> diff --git a/btrfs-find-root.c b/btrfs-find-root.c >> index 9b3d7df..374cf81 100644 >> --- a/btrfs-find-root.c >> +++ b/btrfs-find-root.c >> @@ -82,7 +82,7 @@ static struct btrfs_root *open_ctree_broken(int fd, const >> char *device) >> return NULL; >> } >> >> - ret = btrfs_scan_fs_devices(fd, device, &fs_devices); >> + ret = btrfs_scan_fs_devices(fd, device, &fs_devices, 0); >> if (ret) >> goto out; >> >> diff --git a/cmds-chunk.c b/cmds-chunk.c >> index 03314de..6ada328 100644 >> --- a/cmds-chunk.c >> +++ b/cmds-chunk.c >> @@ -1291,7 +1291,7 @@ static int recover_prepare(struct recover_control *rc, >> char *path) >> goto fail_free_sb; >> } >> >> - ret = btrfs_scan_fs_devices(fd, path, &fs_devices); >> + ret = btrfs_scan_fs_devices(fd, path, &fs_devices, 0); >> if (ret) >> goto fail_free_sb; >> >> diff --git a/disk-io.c b/disk-io.c >> index 13dbe27..1b91de6 100644 >> --- a/disk-io.c >> +++ b/disk-io.c >> @@ -909,13 +909,17 @@ void btrfs_cleanup_all_caches(struct btrfs_fs_info >> *fs_info) >> } >> >> int btrfs_scan_fs_devices(int fd, const char *path, >> - struct btrfs_fs_devices **fs_devices) >> + struct btrfs_fs_devices **fs_devices, >> + u64 super_bytenr) >> { >> u64 total_devs; >> int ret; >> >> + if (super_bytenr == 0) >> + super_bytenr = BTRFS_SUPER_INFO_OFFSET; >> + >> ret = btrfs_scan_one_device(fd, path, fs_devices, >> - &total_devs, BTRFS_SUPER_INFO_OFFSET); >> + &total_devs, super_bytenr); >> if (ret) { >> fprintf(stderr, "No valid Btrfs found on %s\n", path); >> return ret; >> @@ -1001,7 +1005,7 @@ static struct btrfs_fs_info *__open_ctree_fd(int fp, >> const char *path, >> if (restore) >> fs_info->on_restoring = 1; >> >> - ret = btrfs_scan_fs_devices(fp, path, &fs_devices); >> + ret = btrfs_scan_fs_devices(fp, path, &fs_devices, sb_bytenr); >> if (ret) >> goto out; >> >> diff --git a/disk-io.h b/disk-io.h >> index effaa9f..d7792e0 100644 >> --- a/disk-io.h >> +++ b/disk-io.h >> @@ -59,7 +59,8 @@ int btrfs_setup_all_roots(struct btrfs_fs_info *fs_info, >> void btrfs_release_all_roots(struct btrfs_fs_info *fs_info); >> void btrfs_cleanup_all_caches(struct btrfs_fs_info *fs_info); >> int btrfs_scan_fs_devices(int fd, const char *path, >> - struct btrfs_fs_devices **fs_devices); >> + struct btrfs_fs_devices **fs_devices, >> + u64 super_bytenr); >> int btrfs_setup_chunk_tree_and_device_map(struct btrfs_fs_info *fs_info); >> >> struct btrfs_root *open_ctree(const char *filename, u64 sb_bytenr, int >> writes); >> -- >> 1.8.1.4 >> >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in >> the body of a message to majord...@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >
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