From 1366244ab6d0c83bf0f90270e5bb608651a3cc8f Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Tue, 15 Mar 2022 15:41:55 +0100 Subject: [PATCH] 9pfs: Use g_new() & friends where that makes obvious sense MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit g_new(T, n) is neater than g_malloc(sizeof(T) * n). It's also safer, for two reasons. One, it catches multiplication overflowing size_t. Two, it returns T * rather than void *, which lets the compiler catch more type errors. This commit only touches allocations with size arguments of the form sizeof(T). Initial patch created mechanically with: $ spatch --in-place --sp-file scripts/coccinelle/use-g_new-etc.cocci \ --macro-file scripts/cocci-macro-file.h FILES... This uncovers a typing error: ../hw/9pfs/9p.c: In function ‘qid_path_fullmap’: ../hw/9pfs/9p.c:855:13: error: assignment to ‘QpfEntry *’ from incompatible pointer type ‘QppEntry *’ [-Werror=incompatible-pointer-types] 855 | val = g_new0(QppEntry, 1); | ^ Harmless, because QppEntry is larger than QpfEntry. Manually fixed to allocate a QpfEntry instead. Cc: Greg Kurz Cc: Christian Schoenebeck Signed-off-by: Markus Armbruster Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Christian Schoenebeck Reviewed-by: Alex Bennée Reviewed-by: Greg Kurz Message-Id: <20220315144156.1595462-3-armbru@redhat.com> --- hw/9pfs/9p-proxy.c | 2 +- hw/9pfs/9p-synth.c | 4 ++-- hw/9pfs/9p.c | 8 ++++---- hw/9pfs/codir.c | 6 +++--- tests/qtest/virtio-9p-test.c | 4 ++-- 5 files changed, 12 insertions(+), 12 deletions(-) diff --git a/hw/9pfs/9p-proxy.c b/hw/9pfs/9p-proxy.c index 8b4b5cf7dc..4c5e0fc217 100644 --- a/hw/9pfs/9p-proxy.c +++ b/hw/9pfs/9p-proxy.c @@ -1187,7 +1187,7 @@ static int proxy_parse_opts(QemuOpts *opts, FsDriverEntry *fs, Error **errp) static int proxy_init(FsContext *ctx, Error **errp) { - V9fsProxy *proxy = g_malloc(sizeof(V9fsProxy)); + V9fsProxy *proxy = g_new(V9fsProxy, 1); int sock_id; if (ctx->export_flags & V9FS_PROXY_SOCK_NAME) { diff --git a/hw/9pfs/9p-synth.c b/hw/9pfs/9p-synth.c index b3080e415b..d99d263985 100644 --- a/hw/9pfs/9p-synth.c +++ b/hw/9pfs/9p-synth.c @@ -49,7 +49,7 @@ static V9fsSynthNode *v9fs_add_dir_node(V9fsSynthNode *parent, int mode, /* Add directory type and remove write bits */ mode = ((mode & 0777) | S_IFDIR) & ~(S_IWUSR | S_IWGRP | S_IWOTH); - node = g_malloc0(sizeof(V9fsSynthNode)); + node = g_new0(V9fsSynthNode, 1); if (attr) { /* We are adding .. or . entries */ node->attr = attr; @@ -128,7 +128,7 @@ int qemu_v9fs_synth_add_file(V9fsSynthNode *parent, int mode, } /* Add file type and remove write bits */ mode = ((mode & 0777) | S_IFREG); - node = g_malloc0(sizeof(V9fsSynthNode)); + node = g_new0(V9fsSynthNode, 1); node->attr = &node->actual_attr; node->attr->inode = synth_node_count++; node->attr->nlink = 1; diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c index a6d6b3f835..8e9d4aea73 100644 --- a/hw/9pfs/9p.c +++ b/hw/9pfs/9p.c @@ -324,7 +324,7 @@ static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) return NULL; } } - f = g_malloc0(sizeof(V9fsFidState)); + f = g_new0(V9fsFidState, 1); f->fid = fid; f->fid_type = P9_FID_NONE; f->ref = 1; @@ -804,7 +804,7 @@ static int qid_inode_prefix_hash_bits(V9fsPDU *pdu, dev_t dev) val = qht_lookup(&pdu->s->qpd_table, &lookup, hash); if (!val) { - val = g_malloc0(sizeof(QpdEntry)); + val = g_new0(QpdEntry, 1); *val = lookup; affix = affixForIndex(pdu->s->qp_affix_next); val->prefix_bits = affix.bits; @@ -852,7 +852,7 @@ static int qid_path_fullmap(V9fsPDU *pdu, const struct stat *stbuf, return -ENFILE; } - val = g_malloc0(sizeof(QppEntry)); + val = g_new0(QpfEntry, 1); *val = lookup; /* new unique inode and device combo */ @@ -928,7 +928,7 @@ static int qid_path_suffixmap(V9fsPDU *pdu, const struct stat *stbuf, return -ENFILE; } - val = g_malloc0(sizeof(QppEntry)); + val = g_new0(QppEntry, 1); *val = lookup; /* new unique inode affix and device combo */ diff --git a/hw/9pfs/codir.c b/hw/9pfs/codir.c index 75148bc985..93ba44fb75 100644 --- a/hw/9pfs/codir.c +++ b/hw/9pfs/codir.c @@ -141,9 +141,9 @@ static int do_readdir_many(V9fsPDU *pdu, V9fsFidState *fidp, /* append next node to result chain */ if (!e) { - *entries = e = g_malloc0(sizeof(V9fsDirEnt)); + *entries = e = g_new0(V9fsDirEnt, 1); } else { - e = e->next = g_malloc0(sizeof(V9fsDirEnt)); + e = e->next = g_new0(V9fsDirEnt, 1); } e->dent = qemu_dirent_dup(dent); @@ -163,7 +163,7 @@ static int do_readdir_many(V9fsPDU *pdu, V9fsFidState *fidp, break; } - e->st = g_malloc0(sizeof(struct stat)); + e->st = g_new0(struct stat, 1); memcpy(e->st, &stbuf, sizeof(struct stat)); } diff --git a/tests/qtest/virtio-9p-test.c b/tests/qtest/virtio-9p-test.c index 01ca076afe..e28c71bd8f 100644 --- a/tests/qtest/virtio-9p-test.c +++ b/tests/qtest/virtio-9p-test.c @@ -468,12 +468,12 @@ static void v9fs_rreaddir(P9Req *req, uint32_t *count, uint32_t *nentries, togo -= 13 + 8 + 1 + 2 + slen, ++n) { if (!e) { - e = g_malloc(sizeof(struct V9fsDirent)); + e = g_new(struct V9fsDirent, 1); if (entries) { *entries = e; } } else { - e = e->next = g_malloc(sizeof(struct V9fsDirent)); + e = e->next = g_new(struct V9fsDirent, 1); } e->next = NULL; /* qid[13] offset[8] type[1] name[s] */