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fs: handle ENOENT within lib

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This prevents the storms of exceptions that occur when a subvol is
deleted.  We simply treat the entire tree as if it was empty.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>
This commit is contained in:
Zygo Blaxell
2024-11-29 01:07:55 -05:00
parent 72958a5e47
commit 72c3bf8438
1 changed files with 5 additions and 0 deletions
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5
lib/fs.cc
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@ -774,6 +774,11 @@ namespace crucible {
ioctl_ptr->buf_size = buf_size; ioctl_ptr->buf_size = buf_size;
// Don't bother supporting V1. Kernels that old have other problems. // Don't bother supporting V1. Kernels that old have other problems.
int rv = ioctl(fd, BTRFS_IOC_TREE_SEARCH_V2, ioctl_arg.data()); int rv = ioctl(fd, BTRFS_IOC_TREE_SEARCH_V2, ioctl_arg.data());
if (rv != 0 && errno == ENOENT) {
// If we are searching a tree that is deleted or no longer exists, just return an empty list
nr_items = 0;
break;
}
if (rv != 0 && errno != EOVERFLOW) { if (rv != 0 && errno != EOVERFLOW) {
return false; return false;
} }