RepoMirrors/btrfs-progs
1
0
Fork 0
mirror of https://github.com/kdave/btrfs-progs synced 2024-12-22 06:10:06 +00:00
Code Issues Packages Projects Releases Wiki Activity

btrfs-progs: btrfstune: add option to enable NO_HOLES

Browse Source 
New option -n to enable the NO_HOLES feature.

Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
David Sterba 2015-06-02 18:41:01 +02:00
parent c476696b82
commit 6a4a3acbc2
3 changed files with 8 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/btrfstune.asciidoc
View File

@ -24,6 +24,8 @@ Enable seeding forces a fs readonly so that you can use it to build other filesy
Enable extended inode refs.
-x::
Enable skinny metadata extent refs.
-n::
Enable no-holes feature. More efficient representation of file holes.
-f::
Allow dangerous changes, e.g. clear the seeding flag or change fsid. Make sure
that you are aware of the dangers.

6
btrfstune.c
View File

@ -392,6 +392,7 @@ static void print_usage(void)
fprintf(stderr, "\t-S value\tpositive value will enable seeding, zero to disable, negative is not allowed\n");
fprintf(stderr, "\t-r \t\tenable extended inode refs\n");
fprintf(stderr, "\t-x \t\tenable skinny metadata extent refs\n");
fprintf(stderr, "\t-n \t\tenable no-holes feature (more efficient sparse file representation)\n");
fprintf(stderr, "\t-f \t\tforce to do dangerous operation, make sure that you are aware of the dangers\n");
fprintf(stderr, "\t-u \t\tchange fsid, use a random one\n");
fprintf(stderr, "\t-U UUID\t\tchange fsid to UUID\n");
@ -412,7 +413,7 @@ int main(int argc, char *argv[])
optind = 1;
while(1) {
int c = getopt(argc, argv, "S:rxfuU:");
int c = getopt(argc, argv, "S:rxfuU:n");
if (c < 0)
break;
switch(c) {
@ -426,6 +427,9 @@ int main(int argc, char *argv[])
case 'x':
super_flags |= BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA;
break;
case 'n':
super_flags |= BTRFS_FEATURE_INCOMPAT_NO_HOLES;
break;
case 'f':
force = 1;
break;

1
tests/misc-tests/001-btrfstune-features/test.sh
View File

@ -53,4 +53,5 @@ test_feature()
test_feature extref -r EXTENDED_IREF
test_feature skinny-metadata -x SKINNY_METADATA
test_feature no-holes -n NO_HOLES
test_feature '' '-S 1' SEEDING