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bcachefs: BCH_SB_MEMBER_INVALID

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Create a sentinal value for "invalid device".

This is needed for removing devices that have stripes on them (force
removing, without evacuating); we need a sentinal value for the stripe
pointers to the device being removed.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-09-01 18:09:18 -04:00
parent 7f12a963b6
commit 53f6619554
3 changed files with 9 additions and 2 deletions
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3
fs/bcachefs/replicas.c
View File

@ -82,7 +82,8 @@ int bch2_replicas_entry_validate(struct bch_replicas_entry_v1 *r,
}
for (unsigned i = 0; i < r->nr_devs; i++)
if (!bch2_member_exists(sb, r->devs[i])) {
if (r->devs[i] != BCH_SB_MEMBER_INVALID &&
!bch2_member_exists(sb, r->devs[i])) {
prt_printf(err, "invalid device %u in entry ", r->devs[i]);
goto bad;
}

3
fs/bcachefs/sb-members.c
View File

@ -11,7 +11,8 @@
void bch2_dev_missing(struct bch_fs *c, unsigned dev)
{
bch2_fs_inconsistent(c, "pointer to nonexistent device %u", dev);
if (dev != BCH_SB_MEMBER_INVALID)
bch2_fs_inconsistent(c, "pointer to nonexistent device %u", dev);
}
void bch2_dev_bucket_missing(struct bch_fs *c, struct bpos bucket)

5
fs/bcachefs/sb-members_format.h
View File

@ -8,6 +8,11 @@
*/
#define BCH_SB_MEMBERS_MAX 64
/*
* Sentinal value - indicates a device that does not exist
*/
#define BCH_SB_MEMBER_INVALID 255
#define BCH_MIN_NR_NBUCKETS (1 << 6)
#define BCH_IOPS_MEASUREMENTS() \