tAdd some comments to bsrm() - dedup - deduplicating backup program
 (HTM) git clone git://git.z3bra.org/dedup.git
 (DIR) Log
 (DIR) Files
 (DIR) Refs
 (DIR) README
 (DIR) LICENSE
       ---
 (DIR) commit baf29fa2203239eb1767c97b48e093364c7c9f46
 (DIR) parent 00d03339c89087d34d11f3147daae28de6f94c7a
 (HTM) Author: sin <sin@2f30.org>
       Date:   Thu, 25 Apr 2019 22:46:18 +0100
       
       Add some comments to bsrm()
       
       Diffstat:
         M bstorage.c                          |       6 ++++++
       
       1 file changed, 6 insertions(+), 0 deletions(-)
       ---
 (DIR) diff --git a/bstorage.c b/bstorage.c
       t@@ -538,6 +538,7 @@ bsget(struct bctx *bctx, unsigned char *md, void *buf, size_t *n)
                return 0;
        }
        
       +/* Remove a block with the given hash */
        static int
        bsrm(struct bctx *bctx, unsigned char *md)
        {
       t@@ -568,6 +569,11 @@ bsrm(struct bctx *bctx, unsigned char *md)
        
                        mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE;
                        if (fallocate(sctx->fd, mode, bd->offset, bd->size) < 0) {
       +                        /*
       +                         * Filesystem does not support hole punching.
       +                         * Try to recover the block descriptor so we don't
       +                         * lose track of the block.
       +                         */
                                lseek(sctx->fd, bdoffs, SEEK_SET);
                                bd->refcnt++;
                                packbd(sctx->fd, bd);