From 8c6c097b6616154bb5276e5bc315c2bed26dc415 Mon Sep 17 00:00:00 2001 From: mav Date: Fri, 13 Nov 2015 09:46:28 +0000 Subject: [PATCH] MFC r289528: Reduce diff from upstream. Should be no functional change. git-svn-id: svn://svn.freebsd.org/base/stable/10@290762 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f --- .../lib/libzfs/common/libzfs_pool.c | 26 +++++++++---------- 1 file changed, 13 insertions(+), 13 deletions(-) diff --git a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_pool.c b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_pool.c index a8803caf9..1f868d35c 100644 --- a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_pool.c +++ b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_pool.c @@ -3729,17 +3729,18 @@ zpool_history_unpack(char *buf, uint64_t bytes_read, uint64_t *leftover, int zpool_get_history(zpool_handle_t *zhp, nvlist_t **nvhisp) { - char *buf = NULL; - uint64_t bufsize = HIS_BUF_LEN_DEF; + char *buf; + uint64_t buflen = HIS_BUF_LEN_DEF; uint64_t off = 0; nvlist_t **records = NULL; uint_t numrecords = 0; int err, i; - if ((buf = malloc(bufsize)) == NULL) + buf = malloc(buflen); + if (buf == NULL) return (ENOMEM); do { - uint64_t bytes_read = bufsize; + uint64_t bytes_read = buflen; uint64_t leftover; if ((err = get_history(zhp, buf, &off, &bytes_read)) != 0) @@ -3753,18 +3754,16 @@ zpool_get_history(zpool_handle_t *zhp, nvlist_t **nvhisp) &leftover, &records, &numrecords)) != 0) break; off -= leftover; - - /* - * If the history block is too big, double the buffer - * size and try again. - */ if (leftover == bytes_read) { + /* + * no progress made, because buffer is not big enough + * to hold this record; resize and retry. + */ + buflen *= 2; free(buf); buf = NULL; - - bufsize <<= 1; - if ((bufsize >= HIS_BUF_LEN_MAX) || - ((buf = malloc(bufsize)) == NULL)) { + if ((buflen >= HIS_BUF_LEN_MAX) || + ((buf = malloc(buflen)) == NULL)) { err = ENOMEM; break; } @@ -3772,6 +3771,7 @@ zpool_get_history(zpool_handle_t *zhp, nvlist_t **nvhisp) /* CONSTCOND */ } while (1); + free(buf); if (!err) { -- 2.45.0