Rename struct snapshot to struct snap and related constants - dedup - deduplicating backup program
HTML git clone git://bitreich.org/dedup/ git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/dedup/
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---
DIR commit c90df19c4abc00fea111be13b164216a33e5339d
DIR parent 1f0640de77e4cf3d4227dd824d556f09e2bb4200
HTML Author: sin <sin@2f30.org>
Date: Tue, 26 Mar 2019 16:14:15 +0000
Rename struct snapshot to struct snap and related constants
Diffstat:
M dedup.c | 51 ++++++++++++++++---------------
M dedup.h | 24 ++++++++++++------------
M types.c | 16 ++++++++--------
3 files changed, 46 insertions(+), 45 deletions(-)
---
DIR diff --git a/dedup.c b/dedup.c
@@ -28,7 +28,7 @@ struct extract_args {
int ret;
};
-static struct snapshot_hdr snap_hdr;
+static struct snap_hdr snap_hdr;
static struct blk_hdr blk_hdr;
static struct cache *cache;
static int ifd;
@@ -72,10 +72,10 @@ print_stats(struct stats *st)
fprintf(stderr, "Cache misses: %llu\n", cache_misses);
}
-static struct snapshot *
+static struct snap *
alloc_snap(void)
{
- struct snapshot *snap;
+ struct snap *snap;
snap = calloc(1, sizeof(*snap));
if (snap == NULL)
@@ -84,7 +84,7 @@ alloc_snap(void)
}
static void
-free_snap(struct snapshot *snap)
+free_snap(struct snap *snap)
{
free(snap);
}
@@ -94,7 +94,7 @@ free_snap(struct snapshot *snap)
* hash of its block descriptors.
*/
static void
-hash_snap(struct snapshot *snap, uint8_t *md)
+hash_snap(struct snap *snap, uint8_t *md)
{
blake2b_state ctx;
uint64_t i;
@@ -109,8 +109,8 @@ hash_snap(struct snapshot *snap, uint8_t *md)
blake2b_final(&ctx, md, MDSIZE);
}
-static struct snapshot *
-grow_snap(struct snapshot *snap, uint64_t nr_blk_descs)
+static struct snap *
+grow_snap(struct snap *snap, uint64_t nr_blk_descs)
{
size_t size;
@@ -129,7 +129,7 @@ grow_snap(struct snapshot *snap, uint64_t nr_blk_descs)
}
static void
-append_snap(struct snapshot *snap)
+append_snap(struct snap *snap)
{
if (snap->nr_blk_descs > UINT64_MAX / BLK_DESC_SIZE)
errx(1, "%s: overflow", __func__);
@@ -140,16 +140,16 @@ append_snap(struct snapshot *snap)
snap->size += SNAPSHOT_SIZE;
xlseek(ifd, snap_hdr.size, SEEK_SET);
- write_snapshot(ifd, snap);
- write_snapshot_blk_descs(ifd, snap);
+ write_snap(ifd, snap);
+ write_snap_blk_descs(ifd, snap);
if (snap_hdr.size > UINT64_MAX - snap->size)
errx(1, "%s: overflow", __func__);
snap_hdr.size += snap->size;
- if (snap_hdr.nr_snapshots > UINT64_MAX - 1)
+ if (snap_hdr.nr_snaps > UINT64_MAX - 1)
errx(1, "%s: overflow", __func__);
- snap_hdr.nr_snapshots++;
+ snap_hdr.nr_snaps++;
}
static uint8_t *
@@ -204,7 +204,7 @@ append_blk(uint8_t *buf, struct blk_desc *blk_desc)
}
static void
-dedup_chunk(struct snapshot *snap, uint8_t *chunkp, size_t chunk_size)
+dedup_chunk(struct snap *snap, uint8_t *chunkp, size_t chunk_size)
{
uint8_t md[MDSIZE];
struct blk_desc blk_desc;
@@ -248,7 +248,7 @@ dedup_chunk(struct snapshot *snap, uint8_t *chunkp, size_t chunk_size)
static void
dedup(int fd, char *msg)
{
- struct snapshot *snap;
+ struct snap *snap;
struct chunker *chunker;
snap = alloc_snap();
@@ -284,7 +284,7 @@ dedup(int fd, char *msg)
}
static int
-extract(struct snapshot *snap, void *arg)
+extract(struct snap *snap, void *arg)
{
uint8_t *buf[2];
struct extract_args *args = arg;
@@ -311,11 +311,12 @@ extract(struct snapshot *snap, void *arg)
}
/*
- * For each snapshot, hash every block and check if the hash
- * matches the one in the corresponding block descriptor.
+ * Hash every block referenced by the given snapshot
+ * and compare its hash with the one stored in the corresponding
+ * block descriptor.
*/
static int
-check_snap(struct snapshot *snap, void *arg)
+check_snap(struct snap *snap, void *arg)
{
uint8_t *buf;
int *ret = arg;
@@ -361,7 +362,7 @@ check_snap(struct snapshot *snap, void *arg)
}
static int
-build_cache(struct snapshot *snap, void *arg)
+build_cache(struct snap *snap, void *arg)
{
uint8_t *buf;
uint64_t i;
@@ -378,7 +379,7 @@ build_cache(struct snapshot *snap, void *arg)
}
static int
-list(struct snapshot *snap, void *arg)
+list(struct snap *snap, void *arg)
{
print_md(stdout, snap->md, sizeof(snap->md));
if (snap->msg[0] != '\0')
@@ -390,19 +391,19 @@ list(struct snapshot *snap, void *arg)
/* Walk through all snapshots and call fn() on each one */
static void
-walk_snap(int (*fn)(struct snapshot *, void *), void *arg)
+walk_snap(int (*fn)(struct snap *, void *), void *arg)
{
uint64_t i;
xlseek(ifd, SNAP_HDR_SIZE, SEEK_SET);
- for (i = 0; i < snap_hdr.nr_snapshots; i++) {
- struct snapshot *snap;
+ for (i = 0; i < snap_hdr.nr_snaps; i++) {
+ struct snap *snap;
int ret;
snap = alloc_snap();
- read_snapshot(ifd, snap);
+ read_snap(ifd, snap);
snap = grow_snap(snap, snap->nr_blk_descs);
- read_snapshot_descs(ifd, snap);
+ read_snap_descs(ifd, snap);
ret = (*fn)(snap, arg);
free(snap);
DIR diff --git a/dedup.h b/dedup.h
@@ -38,10 +38,10 @@ struct stats {
uint64_t reserved[4];
};
-struct snapshot_hdr {
+struct snap_hdr {
uint64_t flags; /* bottom 16 bits are maj/min version */
uint64_t size; /* size of snapshots file */
- uint64_t nr_snapshots;
+ uint64_t nr_snaps;
struct stats st;
};
@@ -56,10 +56,10 @@ struct blk_desc {
uint64_t size; /* size of block */
};
-struct snapshot {
- uint64_t size; /* size of snapshot (including block descriptors) */
- uint8_t msg[MSGSIZE]; /* arbitrary message attached to snapshot */
- uint8_t md[MDSIZE]; /* hash of snapshot */
+struct snap {
+ uint64_t size; /* size of snap (including block descriptors) */
+ uint8_t msg[MSGSIZE]; /* arbitrary message attached to snap */
+ uint8_t md[MDSIZE]; /* hash of snap */
uint64_t nr_blk_descs;
struct blk_desc blk_desc[];
};
@@ -97,16 +97,16 @@ int pack(unsigned char *dst, char *fmt, ...);
int unpack(unsigned char *src, char *fmt, ...);
/* types.c */
-void read_snap_hdr(int fd, struct snapshot_hdr *hdr);
-void write_snap_hdr(int fd, struct snapshot_hdr *hdr);
+void read_snap_hdr(int fd, struct snap_hdr *hdr);
+void write_snap_hdr(int fd, struct snap_hdr *hdr);
void read_blk_hdr(int fd, struct blk_hdr *hdr);
void write_blk_hdr(int fd, struct blk_hdr *hdr);
void read_blk_desc(int fd, struct blk_desc *desc);
void write_blk_desc(int fd, struct blk_desc *desc);
-void read_snapshot(int fd, struct snapshot *snap);
-void read_snapshot_descs(int fd, struct snapshot *snap);
-void write_snapshot(int fd, struct snapshot *snap);
-void write_snapshot_blk_descs(int fd, struct snapshot *snap);
+void read_snap(int fd, struct snap *snap);
+void read_snap_descs(int fd, struct snap *snap);
+void write_snap(int fd, struct snap *snap);
+void write_snap_blk_descs(int fd, struct snap *snap);
/* utils.c */
void str2bin(char *s, uint8_t *d);
DIR diff --git a/types.c b/types.c
@@ -9,7 +9,7 @@
#include "dedup.h"
void
-read_snap_hdr(int fd, struct snapshot_hdr *hdr)
+read_snap_hdr(int fd, struct snap_hdr *hdr)
{
uint8_t buf[SNAP_HDR_SIZE];
int n;
@@ -20,7 +20,7 @@ read_snap_hdr(int fd, struct snapshot_hdr *hdr)
n = unpack(buf, "qqq",
&hdr->flags,
&hdr->size,
- &hdr->nr_snapshots);
+ &hdr->nr_snaps);
n += unpack(&buf[n], "qqqqqq",
&hdr->st.orig_size,
@@ -40,7 +40,7 @@ read_snap_hdr(int fd, struct snapshot_hdr *hdr)
}
void
-write_snap_hdr(int fd, struct snapshot_hdr *hdr)
+write_snap_hdr(int fd, struct snap_hdr *hdr)
{
uint8_t buf[SNAP_HDR_SIZE];
int n;
@@ -48,7 +48,7 @@ write_snap_hdr(int fd, struct snapshot_hdr *hdr)
n = pack(buf, "qqq",
hdr->flags,
hdr->size,
- hdr->nr_snapshots);
+ hdr->nr_snaps);
n += pack(&buf[n], "qqqqqq",
hdr->st.orig_size,
@@ -135,7 +135,7 @@ write_blk_desc(int fd, struct blk_desc *desc)
}
void
-read_snapshot(int fd, struct snapshot *snap)
+read_snap(int fd, struct snap *snap)
{
uint8_t buf[SNAPSHOT_SIZE];
char fmt[BUFSIZ];
@@ -155,7 +155,7 @@ read_snapshot(int fd, struct snapshot *snap)
};
void
-read_snapshot_descs(int fd, struct snapshot *snap)
+read_snap_descs(int fd, struct snap *snap)
{
uint64_t i;
@@ -164,7 +164,7 @@ read_snapshot_descs(int fd, struct snapshot *snap)
}
void
-write_snapshot(int fd, struct snapshot *snap)
+write_snap(int fd, struct snap *snap)
{
uint8_t buf[SNAPSHOT_SIZE];
char fmt[BUFSIZ];
@@ -182,7 +182,7 @@ write_snapshot(int fd, struct snapshot *snap)
}
void
-write_snapshot_blk_descs(int fd, struct snapshot *snap)
+write_snap_blk_descs(int fd, struct snap *snap)
{
uint64_t i;