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-rw-r--r--cmd/zdb/zdb.c255
1 files changed, 162 insertions, 93 deletions
diff --git a/cmd/zdb/zdb.c b/cmd/zdb/zdb.c
index f00df5d57..d6d8b91a9 100644
--- a/cmd/zdb/zdb.c
+++ b/cmd/zdb/zdb.c
@@ -6410,6 +6410,18 @@ dump_zpool(spa_t *spa)
}
}
+#define ZDB_FLAG_CHECKSUM 0x0001
+#define ZDB_FLAG_DECOMPRESS 0x0002
+#define ZDB_FLAG_BSWAP 0x0004
+#define ZDB_FLAG_GBH 0x0008
+#define ZDB_FLAG_INDIRECT 0x0010
+#define ZDB_FLAG_RAW 0x0020
+#define ZDB_FLAG_PRINT_BLKPTR 0x0040
+#define ZDB_FLAG_VERBOSE 0x0080
+
+static int flagbits[256];
+static char flagbitstr[16];
+
static void
zdb_print_blkptr(blkptr_t *bp, int flags)
{
@@ -6576,6 +6588,83 @@ zdb_parse_block_sizes(char *sizes, uint64_t *lsize, uint64_t *psize)
#define ZIO_COMPRESS_MASK(alg) (1ULL << (ZIO_COMPRESS_##alg))
+static boolean_t
+zdb_decompress_block(abd_t *pabd, void *buf, void *lbuf, uint64_t lsize,
+ uint64_t psize, int flags)
+{
+ boolean_t exceeded = B_FALSE;
+ /*
+ * We don't know how the data was compressed, so just try
+ * every decompress function at every inflated blocksize.
+ */
+ void *lbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
+ int cfuncs[ZIO_COMPRESS_FUNCTIONS] = { 0 };
+ int *cfuncp = cfuncs;
+ uint64_t maxlsize = SPA_MAXBLOCKSIZE;
+ uint64_t mask = ZIO_COMPRESS_MASK(ON) | ZIO_COMPRESS_MASK(OFF) |
+ ZIO_COMPRESS_MASK(INHERIT) | ZIO_COMPRESS_MASK(EMPTY) |
+ (getenv("ZDB_NO_ZLE") ? ZIO_COMPRESS_MASK(ZLE) : 0);
+ *cfuncp++ = ZIO_COMPRESS_LZ4;
+ *cfuncp++ = ZIO_COMPRESS_LZJB;
+ mask |= ZIO_COMPRESS_MASK(LZ4) | ZIO_COMPRESS_MASK(LZJB);
+ for (int c = 0; c < ZIO_COMPRESS_FUNCTIONS; c++)
+ if (((1ULL << c) & mask) == 0)
+ *cfuncp++ = c;
+
+ /*
+ * On the one hand, with SPA_MAXBLOCKSIZE at 16MB, this
+ * could take a while and we should let the user know
+ * we are not stuck. On the other hand, printing progress
+ * info gets old after a while. User can specify 'v' flag
+ * to see the progression.
+ */
+ if (lsize == psize)
+ lsize += SPA_MINBLOCKSIZE;
+ else
+ maxlsize = lsize;
+ for (; lsize <= maxlsize; lsize += SPA_MINBLOCKSIZE) {
+ for (cfuncp = cfuncs; *cfuncp; cfuncp++) {
+ if (flags & ZDB_FLAG_VERBOSE) {
+ (void) fprintf(stderr,
+ "Trying %05llx -> %05llx (%s)\n",
+ (u_longlong_t)psize,
+ (u_longlong_t)lsize,
+ zio_compress_table[*cfuncp].\
+ ci_name);
+ }
+
+ /*
+ * We randomize lbuf2, and decompress to both
+ * lbuf and lbuf2. This way, we will know if
+ * decompression fill exactly to lsize.
+ */
+ VERIFY0(random_get_pseudo_bytes(lbuf2, lsize));
+
+ if (zio_decompress_data(*cfuncp, pabd,
+ lbuf, psize, lsize) == 0 &&
+ zio_decompress_data(*cfuncp, pabd,
+ lbuf2, psize, lsize) == 0 &&
+ bcmp(lbuf, lbuf2, lsize) == 0)
+ break;
+ }
+ if (*cfuncp != 0)
+ break;
+ }
+ umem_free(lbuf2, SPA_MAXBLOCKSIZE);
+
+ if (lsize > maxlsize) {
+ exceeded = B_TRUE;
+ }
+ buf = lbuf;
+ if (*cfuncp == ZIO_COMPRESS_ZLE) {
+ printf("\nZLE decompression was selected. If you "
+ "suspect the results are wrong,\ntry avoiding ZLE "
+ "by setting and exporting ZDB_NO_ZLE=\"true\"\n");
+ }
+
+ return (exceeded);
+}
+
/*
* Read a block from a pool and print it out. The syntax of the
* block descriptor is:
@@ -6610,7 +6699,7 @@ zdb_read_block(char *thing, spa_t *spa)
void *lbuf, *buf;
char *s, *p, *dup, *vdev, *flagstr, *sizes;
int i, error;
- boolean_t borrowed = B_FALSE;
+ boolean_t borrowed = B_FALSE, found = B_FALSE;
dup = strdup(thing);
s = strtok(dup, ":");
@@ -6630,41 +6719,57 @@ zdb_read_block(char *thing, spa_t *spa)
s = "offset must be a multiple of sector size";
if (s) {
(void) printf("Invalid block specifier: %s - %s\n", thing, s);
- free(flagstr);
- free(dup);
- return;
+ goto done;
}
for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
- for (i = 0; flagstr[i]; i++) {
+ for (i = 0; i < strlen(flagstr); i++) {
int bit = flagbits[(uchar_t)flagstr[i]];
if (bit == 0) {
- (void) printf("***Invalid flag: %c\n",
- flagstr[i]);
+ (void) printf("***Ignoring flag: %c\n",
+ (uchar_t)flagstr[i]);
continue;
}
+ found = B_TRUE;
flags |= bit;
- /* If it's not something with an argument, keep going */
- if ((bit & (ZDB_FLAG_CHECKSUM |
- ZDB_FLAG_PRINT_BLKPTR)) == 0)
- continue;
-
p = &flagstr[i + 1];
- if (bit == ZDB_FLAG_PRINT_BLKPTR) {
- blkptr_offset = strtoull(p, &p, 16);
- i = p - &flagstr[i + 1];
- }
if (*p != ':' && *p != '\0') {
- (void) printf("***Invalid flag arg: '%s'\n", s);
- free(flagstr);
- free(dup);
- return;
+ int j = 0, nextbit = flagbits[(uchar_t)*p];
+ char *end, offstr[8] = { 0 };
+ if ((bit == ZDB_FLAG_PRINT_BLKPTR) &&
+ (nextbit == 0)) {
+ /* look ahead to isolate the offset */
+ while (nextbit == 0 &&
+ strchr(flagbitstr, *p) == NULL) {
+ offstr[j] = *p;
+ j++;
+ if (i + j > strlen(flagstr))
+ break;
+ p++;
+ nextbit = flagbits[(uchar_t)*p];
+ }
+ blkptr_offset = strtoull(offstr, &end,
+ 16);
+ i += j;
+ } else if (nextbit == 0) {
+ (void) printf("***Ignoring flag arg:"
+ " '%c'\n", (uchar_t)*p);
+ }
}
}
}
- free(flagstr);
+ if (blkptr_offset % sizeof (blkptr_t)) {
+ printf("Block pointer offset 0x%llx "
+ "must be divisible by 0x%x\n",
+ (longlong_t)blkptr_offset, (int)sizeof (blkptr_t));
+ goto done;
+ }
+ if (found == B_FALSE && strlen(flagstr) > 0) {
+ printf("Invalid flag arg: '%s'\n", flagstr);
+ goto done;
+ }
vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
if (vd == NULL) {
@@ -6717,10 +6822,9 @@ zdb_read_block(char *thing, spa_t *spa)
*/
zio_nowait(zio_vdev_child_io(zio, bp, vd, offset, pabd,
psize, ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ,
- ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
- ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY |
- ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW | ZIO_FLAG_OPTIONAL,
- NULL, NULL));
+ ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_PROPAGATE |
+ ZIO_FLAG_DONT_RETRY | ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW |
+ ZIO_FLAG_OPTIONAL, NULL, NULL));
}
error = zio_wait(zio);
@@ -6731,80 +6835,43 @@ zdb_read_block(char *thing, spa_t *spa)
goto out;
}
+ uint64_t orig_lsize = lsize;
+ buf = lbuf;
if (flags & ZDB_FLAG_DECOMPRESS) {
- /*
- * We don't know how the data was compressed, so just try
- * every decompress function at every inflated blocksize.
- */
- void *lbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
- int cfuncs[ZIO_COMPRESS_FUNCTIONS] = { 0 };
- int *cfuncp = cfuncs;
- uint64_t maxlsize = SPA_MAXBLOCKSIZE;
- uint64_t mask = ZIO_COMPRESS_MASK(ON) | ZIO_COMPRESS_MASK(OFF) |
- ZIO_COMPRESS_MASK(INHERIT) | ZIO_COMPRESS_MASK(EMPTY) |
- (getenv("ZDB_NO_ZLE") ? ZIO_COMPRESS_MASK(ZLE) : 0);
- *cfuncp++ = ZIO_COMPRESS_LZ4;
- *cfuncp++ = ZIO_COMPRESS_LZJB;
- mask |= ZIO_COMPRESS_MASK(LZ4) | ZIO_COMPRESS_MASK(LZJB);
- for (int c = 0; c < ZIO_COMPRESS_FUNCTIONS; c++)
- if (((1ULL << c) & mask) == 0)
- *cfuncp++ = c;
-
- /*
- * On the one hand, with SPA_MAXBLOCKSIZE at 16MB, this
- * could take a while and we should let the user know
- * we are not stuck. On the other hand, printing progress
- * info gets old after a while. User can specify 'v' flag
- * to see the progression.
- */
- if (lsize == psize)
- lsize += SPA_MINBLOCKSIZE;
- else
- maxlsize = lsize;
- for (; lsize <= maxlsize; lsize += SPA_MINBLOCKSIZE) {
- for (cfuncp = cfuncs; *cfuncp; cfuncp++) {
- if (flags & ZDB_FLAG_VERBOSE) {
- (void) fprintf(stderr,
- "Trying %05llx -> %05llx (%s)\n",
- (u_longlong_t)psize,
- (u_longlong_t)lsize,
- zio_compress_table[*cfuncp].\
- ci_name);
- }
-
- /*
- * We randomize lbuf2, and decompress to both
- * lbuf and lbuf2. This way, we will know if
- * decompression fill exactly to lsize.
- */
- VERIFY0(random_get_pseudo_bytes(lbuf2, lsize));
-
- if (zio_decompress_data(*cfuncp, pabd,
- lbuf, psize, lsize) == 0 &&
- zio_decompress_data(*cfuncp, pabd,
- lbuf2, psize, lsize) == 0 &&
- bcmp(lbuf, lbuf2, lsize) == 0)
- break;
- }
- if (*cfuncp != 0)
- break;
- }
- umem_free(lbuf2, SPA_MAXBLOCKSIZE);
-
- if (lsize > maxlsize) {
+ boolean_t failed = zdb_decompress_block(pabd, buf, lbuf,
+ lsize, psize, flags);
+ if (failed) {
(void) printf("Decompress of %s failed\n", thing);
goto out;
}
- buf = lbuf;
- if (*cfuncp == ZIO_COMPRESS_ZLE) {
- printf("\nZLE decompression was selected. If you "
- "suspect the results are wrong,\ntry avoiding ZLE "
- "by setting and exporting ZDB_NO_ZLE=\"true\"\n");
- }
} else {
buf = abd_borrow_buf_copy(pabd, lsize);
borrowed = B_TRUE;
}
+ /*
+ * Try to detect invalid block pointer. If invalid, try
+ * decompressing.
+ */
+ if ((flags & ZDB_FLAG_PRINT_BLKPTR || flags & ZDB_FLAG_INDIRECT) &&
+ !(flags & ZDB_FLAG_DECOMPRESS)) {
+ const blkptr_t *b = (const blkptr_t *)(void *)
+ ((uintptr_t)buf + (uintptr_t)blkptr_offset);
+ if (zfs_blkptr_verify(spa, b, B_FALSE, BLK_VERIFY_ONLY) ==
+ B_FALSE) {
+ abd_return_buf_copy(pabd, buf, lsize);
+ borrowed = B_FALSE;
+ buf = lbuf;
+ boolean_t failed = zdb_decompress_block(pabd, buf,
+ lbuf, lsize, psize, flags);
+ b = (const blkptr_t *)(void *)
+ ((uintptr_t)buf + (uintptr_t)blkptr_offset);
+ if (failed || zfs_blkptr_verify(spa, b, B_FALSE,
+ BLK_VERIFY_LOG) == B_FALSE) {
+ printf("invalid block pointer at this DVA\n");
+ goto out;
+ }
+ }
+ }
if (flags & ZDB_FLAG_PRINT_BLKPTR)
zdb_print_blkptr((blkptr_t *)(void *)
@@ -6812,8 +6879,8 @@ zdb_read_block(char *thing, spa_t *spa)
else if (flags & ZDB_FLAG_RAW)
zdb_dump_block_raw(buf, lsize, flags);
else if (flags & ZDB_FLAG_INDIRECT)
- zdb_dump_indirect((blkptr_t *)buf, lsize / sizeof (blkptr_t),
- flags);
+ zdb_dump_indirect((blkptr_t *)buf,
+ orig_lsize / sizeof (blkptr_t), flags);
else if (flags & ZDB_FLAG_GBH)
zdb_dump_gbh(buf, flags);
else
@@ -6886,6 +6953,8 @@ zdb_read_block(char *thing, spa_t *spa)
out:
abd_free(pabd);
umem_free(lbuf, SPA_MAXBLOCKSIZE);
+done:
+ free(flagstr);
free(dup);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 02:52:06 +0000