Multiple files: calloc -> malloc

xlators/storage/posix/src/posix-inode-fd-ops.c:
xlators/storage/posix/src/posix-helpers.c:
xlators/storage/bd/src/bd.c:
xlators/protocol/client/src/client-lk.c:
xlators/performance/quick-read/src/quick-read.c:
xlators/performance/io-cache/src/page.c
xlators/nfs/server/src/nfs3-helpers.c
xlators/nfs/server/src/nfs-fops.c
xlators/nfs/server/src/mount3udp_svc.c
xlators/nfs/server/src/mount3.c
xlators/mount/fuse/src/fuse-helpers.c
xlators/mount/fuse/src/fuse-bridge.c
xlators/mgmt/glusterd/src/glusterd-utils.c
xlators/mgmt/glusterd/src/glusterd-syncop.h
xlators/mgmt/glusterd/src/glusterd-snapshot.c
xlators/mgmt/glusterd/src/glusterd-rpc-ops.c
xlators/mgmt/glusterd/src/glusterd-replace-brick.c
xlators/mgmt/glusterd/src/glusterd-op-sm.c
xlators/mgmt/glusterd/src/glusterd-mgmt.c
xlators/meta/src/subvolumes-dir.c
xlators/meta/src/graph-dir.c
xlators/features/trash/src/trash.c
xlators/features/shard/src/shard.h
xlators/features/shard/src/shard.c
xlators/features/marker/src/marker-quota.c
xlators/features/locks/src/common.c
xlators/features/leases/src/leases-internal.c
xlators/features/gfid-access/src/gfid-access.c
xlators/features/cloudsync/src/cloudsync-plugins/src/cloudsyncs3/src/libcloudsyncs3.c
xlators/features/bit-rot/src/bitd/bit-rot.c
xlators/features/bit-rot/src/bitd/bit-rot-scrub.c
bxlators/encryption/crypt/src/metadata.c
xlators/encryption/crypt/src/crypt.c
xlators/performance/md-cache/src/md-cache.c:

Move to GF_MALLOC() instead of GF_CALLOC() when possible

It doesn't make sense to calloc (allocate and clear) memory
when the code right away fills that memory with data.
It may be optimized by the compiler, or have a microscopic
performance improvement.

In some cases, also changed allocation size to be sizeof some
struct or type instead of a pointer - easier to read.
In some cases, removed redundant strlen() calls by saving the result
into a variable.

1. Only done for the straightforward cases. There's room for improvement.
2. Please review carefully, especially for string allocation, with the
terminating NULL string.

Only compile-tested!

.. and allocate memory as much as needed.

xlators/nfs/server/src/mount3.c :

Don't blindly allocate PATH_MAX, but strlen() the string and allocate
appropriately.
Also, align error messges.

updates: bz#1193929
Original-Author: Yaniv Kaul <ykaul@redhat.com>
Signed-off-by: Yaniv Kaul <ykaul@redhat.com>
Signed-off-by: Yaniv Kaul <ykaul@redhat.com>
Change-Id: Ibda6f33dd180b7f7694f20a12af1e9576fe197f5

1 files changed, 25 insertions, 19 deletions

diff --git a/xlators/nfs/server/src/mount3.c b/xlators/nfs/server/src/mount3.c
index 187c975081d..f3d7def64d0 100644
--- a/xlators/nfs/server/src/mount3.c
+++ b/xlators/nfs/server/src/mount3.c
@@ -761,6 +761,7 @@ mnt3svc_lookup_mount_cbk (call_frame_t *frame, void  *cookie,
         char                    *path = NULL;
         uuid_t                  mountid = {1, };
         char                    fhstr[1536];
+        int                     alloclen = 0;
 
         req = (rpcsvc_request_t *)frame->local;
 
@@ -786,14 +787,16 @@ mnt3svc_lookup_mount_cbk (call_frame_t *frame, void  *cookie,
         if (status != MNT3_OK)
                 goto xmit_res;
 
-        path = GF_CALLOC (PATH_MAX, sizeof (char), gf_nfs_mt_char);
+        alloclen = strlen(mntxl->name) + 2;
+        path = GF_MALLOC (alloclen, gf_nfs_mt_char);
         if (!path) {
-                gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM, NFS_MSG_NO_MEMORY,
-                        "Out of memory");
+                gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM,
+                        NFS_MSG_NO_MEMORY,
+                        "Memory allocation failed.");
                 goto xmit_res;
         }
 
-        snprintf (path, PATH_MAX, "/%s", mntxl->name);
+        snprintf (path, alloclen, "/%s", mntxl->name);
         mnt3svc_update_mountlist (ms, req, path, NULL);
         GF_FREE (path);
         if (gf_nfs_dvm_off (nfs_state (ms->nfsx))) {
@@ -1148,18 +1151,19 @@ mnt3_resolve_subdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 
         nfs3_fh_build_child_fh (&mres->parentfh, buf, &fh);
         if (strlen (mres->remainingdir) <= 0) {
-                size_t alloclen;
+                int alloclen;
                 op_ret = -1;
                 mntstat = MNT3_OK;
 
                 /* Construct the full path */
+                int resolveloc_path_len = strlen(mres->resolveloc.path);
                 alloclen = strlen (mres->exp->expname) +
-                                   strlen (mres->resolveloc.path) + 1;
-                mres->exp->fullpath = GF_CALLOC (alloclen, sizeof (char),
-                                                gf_nfs_mt_char);
+                                   resolveloc_path_len + 1;
+                mres->exp->fullpath = GF_MALLOC (alloclen, gf_nfs_mt_char);
                 if (!mres->exp->fullpath) {
-                        gf_msg (GF_MNT, GF_LOG_CRITICAL, ENOMEM,
-                                NFS_MSG_NO_MEMORY, "Allocation failed.");
+                        gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM,
+                                NFS_MSG_NO_MEMORY,
+                                "Memory allocation failed.");
                         goto err;
                 }
                 snprintf (mres->exp->fullpath, alloclen, "%s%s",
@@ -1178,7 +1182,9 @@ mnt3_resolve_subdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                         goto err;
                 }
 
-                path = GF_CALLOC (PATH_MAX, sizeof (char), gf_nfs_mt_char);
+                alloclen = strlen (mres->exp->vol->name) +
+                                   resolveloc_path_len + 2;
+                path = GF_MALLOC (alloclen, gf_nfs_mt_char);
                 if (!path) {
                         gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM,
                                 NFS_MSG_NO_MEMORY,
@@ -1190,7 +1196,7 @@ mnt3_resolve_subdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                  */
                 __mnt3_build_mountid_from_path (authorized_path, fh.mountid);
 
-                snprintf (path, PATH_MAX, "/%s%s", mres->exp->vol->name,
+                snprintf (path, alloclen, "/%s%s", mres->exp->vol->name,
                          mres->resolveloc.path);
 
                 mnt3svc_update_mountlist (mres->mstate, mres->req,
@@ -1293,12 +1299,12 @@ mnt3_readlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         /* Building the actual mount path to be mounted */
         path_len = strlen (mres->exp->vol->name) +  strlen (absolute_path)
                    + strlen (mres->remainingdir) + 1;
-        real_loc = GF_CALLOC (1, path_len, gf_nfs_mt_char);
+        real_loc = GF_MALLOC (path_len, gf_nfs_mt_char);
         if (!real_loc) {
                 ret = -ENOMEM;
                 goto mnterr;
         }
-        sprintf (real_loc , "%s%s", mres->exp->vol->name, absolute_path);
+        snprintf (real_loc, path_len, "%s%s", mres->exp->vol->name, absolute_path);
         gf_path_strip_trailing_slashes (real_loc);
 
         /* There may entries after symlink in the mount path,
@@ -2314,7 +2320,7 @@ __build_mountlist (struct mount3_state *ms, int *count)
                 if (!first)
                         first = mlist;
 
-                mlist->ml_directory = GF_CALLOC (namelen + 2, sizeof (char),
+                mlist->ml_directory = GF_MALLOC (namelen + 2,
                                                  gf_nfs_mt_char);
                 if (!mlist->ml_directory) {
                         gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM,
@@ -2325,7 +2331,7 @@ __build_mountlist (struct mount3_state *ms, int *count)
                 strcpy (mlist->ml_directory, me->exname);
 
                 namelen = strlen (me->hostname);
-                mlist->ml_hostname = GF_CALLOC (namelen + 2, sizeof (char),
+                mlist->ml_hostname = GF_MALLOC (namelen + 2,
                                                 gf_nfs_mt_char);
                 if (!mlist->ml_hostname) {
                         gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM,
@@ -2654,7 +2660,6 @@ mnt3_xlchildren_to_exports (rpcsvc_t *svc, struct mount3_state *ms)
                 if (!nfs_subvolume_started (nfs, ent->vol))
                         continue;
 
-                namelen = strlen (ent->expname) + 1;
                 elist = GF_CALLOC (1, sizeof (*elist), gf_nfs_mt_exportnode);
                 if (!elist) {
                         gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM,
@@ -2663,7 +2668,8 @@ mnt3_xlchildren_to_exports (rpcsvc_t *svc, struct mount3_state *ms)
                 }
                  if (!first)
                          first = elist;
-                elist->ex_dir = GF_CALLOC (namelen + 2, sizeof (char),
+                namelen = strlen (ent->expname);
+                elist->ex_dir = GF_MALLOC (namelen + 2,
                                            gf_nfs_mt_char);
                 if (!elist->ex_dir) {
                         gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM,
@@ -3324,7 +3330,7 @@ mnt3_init_export_ent (struct mount3_state *ms, xlator_t *xl, char *exportpath,
         else
                 alloclen = strlen (xl->name) + 2;
 
-        exp->expname = GF_CALLOC (alloclen, sizeof (char), gf_nfs_mt_char);
+        exp->expname = GF_MALLOC (alloclen, gf_nfs_mt_char);
         if (!exp->expname) {
                 gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM, NFS_MSG_NO_MEMORY,
                         "Memory allocation failed");