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btrfs-progs: btrfstune: force to set seeding flags

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Now we can use -f with -S option when setting seeding flags or clearing
seeding flags

Reported-by: Chen Hanxiao <chenhanxiao@cn.fujitsu.com>
Signed-off-by: Fan Chengniang <fancn.fnst@cn.fujitsu.com>
[updated docs]
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Fan Chengniang 2015-01-19 15:27:30 +08:00 committed by David Sterba
parent 188e79e2fc
commit f66d17814b
2 changed files with 8 additions and 5 deletions
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3
Documentation/btrfstune.txt
View File

@ -25,7 +25,8 @@ Enable extended inode refs.
-x::
Enable skinny metadata extent refs.
-f::
Allow dangerous changes, e.g. clear the seeding flag
Allow dangerous changes, e.g. clear the seeding flag. Make sure that you are
aware of the dangers.
When mounting the new device, btrfs will check whether the seeding flag is set
when try to open seeding device. If the user clears the seeding flag of the

10
btrfstune.c
View File

@ -33,6 +33,7 @@
#include "version.h"
static char *device;
static int force = 0;
static int update_seeding_flag(struct btrfs_root *root, int set_flag)
{
@ -44,8 +45,10 @@ static int update_seeding_flag(struct btrfs_root *root, int set_flag)
super_flags = btrfs_super_flags(disk_super);
if (set_flag) {
if (super_flags & BTRFS_SUPER_FLAG_SEEDING) {
fprintf(stderr, "seeding flag is already set on %s\n",
device);
if (force)
return 0;
else
fprintf(stderr, "seeding flag is already set on %s\n", device);
return 1;
}
super_flags |= BTRFS_SUPER_FLAG_SEEDING;
@ -104,7 +107,7 @@ 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-f \t\tforce to clear flags, make sure that you are aware of the dangers\n");
fprintf(stderr, "\t-f \t\tforce to set or clear flags, make sure that you are aware of the dangers\n");
}
int main(int argc, char *argv[])
@ -116,7 +119,6 @@ int main(int argc, char *argv[])
int seeding_flag = 0;
u64 seeding_value = 0;
int skinny_flag = 0;
int force = 0;
int ret;
optind = 1;