diff options
| author | Justin Maggard <jmaggard10@gmail.com> | 2014-02-14 10:40:47 -0800 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-03-21 06:23:16 -0700 |
| commit | 2a7f8cf9eec0e2b0075fc82552594ebf35bb7093 (patch) | |
| tree | e8e4117f7d90874744ae49966a6f749a8d69cbbe | |
| parent | 1500c52c75beb830ff4234603d3e9d856aafca75 (diff) | |
btrfs-progs: add dry-run option to restore command
Sometimes it is useful to see what btrfs restore is going to do
before provisioning enough external storage to restore onto.
Add a dry-run option so we can see what files and paths are found
by restore, without actually restoring any data.
Signed-off-by: Justin Maggard <jmaggard10@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
| -rw-r--r-- | cmds-restore.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/cmds-restore.c b/cmds-restore.c index 1748262b..fd533ce1 100644 --- a/cmds-restore.c +++ b/cmds-restore.c @@ -53,6 +53,7 @@ static int verbose = 0; static int ignore_errors = 0; static int overwrite = 0; static int get_xattrs = 0; +static int dry_run = 0; #define LZO_LEN 4 #define PAGE_CACHE_SIZE 4096 @@ -801,6 +802,8 @@ static int search_dir(struct btrfs_root *root, struct btrfs_key *key, } if (verbose) printf("Restoring %s\n", path_name); + if (dry_run) + goto next; fd = open(path_name, O_CREAT|O_WRONLY, 0644); if (fd < 0) { fprintf(stderr, "Error creating %s: %d\n", @@ -873,7 +876,10 @@ static int search_dir(struct btrfs_root *root, struct btrfs_key *key, printf("Restoring %s\n", path_name); errno = 0; - ret = mkdir(path_name, 0755); + if (dry_run) + ret = 0; + else + ret = mkdir(path_name, 0755); if (ret && errno != EEXIST) { free(dir); fprintf(stderr, "Error mkdiring %s: %d\n", @@ -1090,6 +1096,7 @@ out: static struct option long_options[] = { { "path-regex", 1, NULL, 256}, + { "dry-run", 0, NULL, 'D'}, { NULL, 0, NULL, 0} }; @@ -1105,9 +1112,10 @@ const char * const cmd_restore_usage[] = { "-t <location> tree location", "-f <offset> filesystem location", "-u <block> super mirror", - "-r <rootid> root objectid", + "-r <rootid> root objectid", "-d find dir", "-l list tree roots", + "-D|--dry-run dry run (only list files that would be recovered)", "--path-regex <regex>", " restore only filenames matching regex,", " you have to use following syntax (possibly quoted):", @@ -1135,7 +1143,7 @@ int cmd_restore(int argc, char **argv) regex_t match_reg, *mreg = NULL; char reg_err[256]; - while ((opt = getopt_long(argc, argv, "sxviot:u:df:r:lc", long_options, + while ((opt = getopt_long(argc, argv, "sxviot:u:df:r:lDc", long_options, &option_index)) != -1) { switch (opt) { @@ -1191,6 +1199,9 @@ int cmd_restore(int argc, char **argv) case 'l': list_roots = 1; break; + case 'D': + dry_run = 1; + break; case 'c': match_cflags |= REG_ICASE; break; @@ -1282,6 +1293,9 @@ int cmd_restore(int argc, char **argv) mreg = &match_reg; } + if (dry_run) + printf("This is a dry-run, no files are going to be restored\n"); + ret = search_dir(root, &key, dir_name, "", mreg); out: |