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authorKaleb S. KEITHLEY <kkeithle@redhat.com>2016-07-07 08:51:08 -0400
committerJeff Darcy <jdarcy@redhat.com>2016-07-18 04:59:42 -0700
commit561746080b0b7154bfb3bdee20d426cf2ef7db17 (patch)
tree0dd0db913055925d7843d85c8066a7c0018a290a /xlators/features/changelog
parent73b9ede7e115fab245b0f59d18e4d6cc4d297cec (diff)
core: use readdir(3) with glibc, and associated cleanup
Starting with glibc-2.23 (i.e. what's in Fedora 25), readdir_r(3) is marked as deprecated. Specifically the function decl in <dirent.h> has the deprecated attribute, and now warnings are thrown during the compile on Fedora 25 builds. The readdir(_r)(3) man page (on Fedora 25 at least) and World+Dog say that glibc's readdir(3) is, and always has been, MT-SAFE as long as only one thread is accessing the directory object returned by opendir(). World+Dog also says there is a potential buffer overflow in readdir_r(). World+Dog suggests that it is preferable to simply use readdir(). There's an implication that eventually readdir_r(3) will be removed from glibc. POSIX has, apparently deprecated it in the standard, or even removed it entirely. Over and above that, our source near the various uses of readdir(_r)(3) has a few unsafe uses of strcpy()+strcat(). (AFAIK nobody has looked at the readdir(3) implemenation in *BSD to see if the same is true on those platforms, and we can't be sure of MacOS even though we know it's based on *BSD.) Change-Id: I5481f18ba1eebe7ee177895eecc9a80a71b60568 BUG: 1356998 Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com> Reviewed-on: http://review.gluster.org/14838 Smoke: Gluster Build System <jenkins@build.gluster.org> Reviewed-by: Niels de Vos <ndevos@redhat.com> CentOS-regression: Gluster Build System <jenkins@build.gluster.org> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Kotresh HR <khiremat@redhat.com> Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
Diffstat (limited to 'xlators/features/changelog')
-rw-r--r--xlators/features/changelog/lib/src/gf-changelog-api.c42
-rw-r--r--xlators/features/changelog/lib/src/gf-history-changelog.c59
-rw-r--r--xlators/features/changelog/src/changelog-mem-types.h11
3 files changed, 56 insertions, 56 deletions
diff --git a/xlators/features/changelog/lib/src/gf-changelog-api.c b/xlators/features/changelog/lib/src/gf-changelog-api.c
index f41b505a749..d2a28bc6d52 100644
--- a/xlators/features/changelog/lib/src/gf-changelog-api.c
+++ b/xlators/features/changelog/lib/src/gf-changelog-api.c
@@ -152,16 +152,16 @@ out:
ssize_t
gf_changelog_scan ()
{
- int ret = 0;
- int tracker_fd = 0;
- size_t len = 0;
- size_t off = 0;
- xlator_t *this = NULL;
- size_t nr_entries = 0;
+ int ret = 0;
+ int tracker_fd = 0;
+ size_t len = 0;
+ size_t off = 0;
+ xlator_t *this = NULL;
+ size_t nr_entries = 0;
gf_changelog_journal_t *jnl = NULL;
- struct dirent *entryp = NULL;
- struct dirent *result = NULL;
- char buffer[PATH_MAX] = {0,};
+ struct dirent *entry = NULL;
+ struct dirent scratch[2] = {{0,},};
+ char buffer[PATH_MAX] = {0,};
this = THIS;
if (!this)
@@ -183,19 +183,17 @@ gf_changelog_scan ()
len = offsetof(struct dirent, d_name)
+ pathconf(jnl->jnl_processing_dir, _PC_NAME_MAX) + 1;
- entryp = GF_CALLOC (1, len,
- gf_changelog_mt_libgfchangelog_dirent_t);
- if (!entryp)
- goto out;
rewinddir (jnl->jnl_dir);
- while (1) {
- ret = readdir_r (jnl->jnl_dir, entryp, &result);
- if (ret || !result)
+
+ for (;;) {
+ errno = 0;
+ entry = sys_readdir (jnl->jnl_dir, scratch);
+ if (!entry || errno != 0)
break;
- if (!strcmp (basename (entryp->d_name), ".")
- || !strcmp (basename (entryp->d_name), ".."))
+ if (!strcmp (basename (entry->d_name), ".")
+ || !strcmp (basename (entry->d_name), ".."))
continue;
nr_entries++;
@@ -203,8 +201,8 @@ gf_changelog_scan ()
GF_CHANGELOG_FILL_BUFFER (jnl->jnl_processing_dir,
buffer, off,
strlen (jnl->jnl_processing_dir));
- GF_CHANGELOG_FILL_BUFFER (entryp->d_name, buffer,
- off, strlen (entryp->d_name));
+ GF_CHANGELOG_FILL_BUFFER (entry->d_name, buffer,
+ off, strlen (entry->d_name));
GF_CHANGELOG_FILL_BUFFER ("\n", buffer, off, 1);
if (gf_changelog_write (tracker_fd, buffer, off) != off) {
@@ -217,9 +215,7 @@ gf_changelog_scan ()
off = 0;
}
- GF_FREE (entryp);
-
- if (!result) {
+ if (!entry) {
if (gf_lseek (tracker_fd, 0, SEEK_SET) != -1)
return nr_entries;
}
diff --git a/xlators/features/changelog/lib/src/gf-history-changelog.c b/xlators/features/changelog/lib/src/gf-history-changelog.c
index 389b65f3b16..5ed50390a7c 100644
--- a/xlators/features/changelog/lib/src/gf-history-changelog.c
+++ b/xlators/features/changelog/lib/src/gf-history-changelog.c
@@ -222,8 +222,8 @@ gf_history_changelog_scan ()
size_t nr_entries = 0;
gf_changelog_journal_t *jnl = NULL;
gf_changelog_journal_t *hist_jnl = NULL;
- struct dirent *entryp = NULL;
- struct dirent *result = NULL;
+ struct dirent *entry = NULL;
+ struct dirent scratch[2] = {{0,},};
char buffer[PATH_MAX] = {0,};
static int is_last_scan;
@@ -260,19 +260,17 @@ gf_history_changelog_scan ()
len = offsetof (struct dirent, d_name)
+ pathconf (hist_jnl->jnl_processing_dir, _PC_NAME_MAX) + 1;
- entryp = GF_CALLOC (1, len,
- gf_changelog_mt_libgfchangelog_dirent_t);
- if (!entryp)
- goto out;
rewinddir (hist_jnl->jnl_dir);
- while (1) {
- ret = readdir_r (hist_jnl->jnl_dir, entryp, &result);
- if (ret || !result)
+
+ for (;;) {
+ errno = 0;
+ entry = sys_readdir (hist_jnl->jnl_dir, scratch);
+ if (!entry || errno != 0)
break;
- if ( !strcmp (basename (entryp->d_name), ".")
- || !strcmp (basename (entryp->d_name), "..") )
+ if (strcmp (basename (entry->d_name), ".") == 0 ||
+ strcmp (basename (entry->d_name), "..") == 0)
continue;
nr_entries++;
@@ -280,8 +278,8 @@ gf_history_changelog_scan ()
GF_CHANGELOG_FILL_BUFFER (hist_jnl->jnl_processing_dir,
buffer, off,
strlen (hist_jnl->jnl_processing_dir));
- GF_CHANGELOG_FILL_BUFFER (entryp->d_name, buffer,
- off, strlen (entryp->d_name));
+ GF_CHANGELOG_FILL_BUFFER (entry->d_name, buffer,
+ off, strlen (entry->d_name));
GF_CHANGELOG_FILL_BUFFER ("\n", buffer, off, 1);
if (gf_changelog_write (tracker_fd, buffer, off) != off) {
@@ -294,13 +292,11 @@ gf_history_changelog_scan ()
off = 0;
}
- GF_FREE (entryp);
-
gf_msg_debug (this->name, 0,
"hist_done %d, is_last_scan: %d",
hist_jnl->hist_done, is_last_scan);
- if (!result) {
+ if (!entry) {
if (gf_lseek (tracker_fd, 0, SEEK_SET) != -1) {
if (nr_entries > 0)
return nr_entries;
@@ -678,7 +674,7 @@ gf_history_consume (void * data)
out:
if (fd != -1)
- sys_close (fd);
+ (void) sys_close (fd);
GF_FREE (hist_data);
return NULL;
}
@@ -794,12 +790,13 @@ gf_history_changelog (char* changelog_dir, unsigned long start,
unsigned long to = 0;
unsigned long from = 0;
unsigned long total_changelog = 0;
- xlator_t *this = NULL;
- gf_changelog_journal_t *jnl = NULL;
- gf_changelog_journal_t *hist_jnl = NULL;
- gf_changelog_history_data_t *hist_data = NULL;
- DIR *dirp = NULL;
- struct dirent *dp = NULL;
+ xlator_t *this = NULL;
+ gf_changelog_journal_t *jnl = NULL;
+ gf_changelog_journal_t *hist_jnl = NULL;
+ gf_changelog_history_data_t *hist_data = NULL;
+ DIR *dirp = NULL;
+ struct dirent *entry = NULL;
+ struct dirent scratch[2] = {{0,},};
pthread_t consume_th = 0;
char htime_dir[PATH_MAX] = {0,};
char buffer[PATH_MAX] = {0,};
@@ -851,8 +848,16 @@ gf_history_changelog (char* changelog_dir, unsigned long start,
goto out;
}
- while ((dp = sys_readdir (dirp)) != NULL) {
- ret = gf_changelog_extract_min_max (dp->d_name, htime_dir,
+ for (;;) {
+
+ errno = 0;
+
+ entry = sys_readdir (dirp, scratch);
+
+ if (!entry || errno != 0)
+ break;
+
+ ret = gf_changelog_extract_min_max (entry->d_name, htime_dir,
&fd, &total_changelog,
&min_ts, &max_ts);
if (ret) {
@@ -968,11 +973,11 @@ gf_history_changelog (char* changelog_dir, unsigned long start,
out:
if (dirp != NULL)
- sys_closedir (dirp);
+ (void) sys_closedir (dirp);
if (ret < 0) {
if (fd != -1)
- sys_close (fd);
+ (void) sys_close (fd);
GF_FREE (hist_data);
(void) pthread_attr_destroy (&attr);
diff --git a/xlators/features/changelog/src/changelog-mem-types.h b/xlators/features/changelog/src/changelog-mem-types.h
index 1618f722f6c..33fea31b979 100644
--- a/xlators/features/changelog/src/changelog-mem-types.h
+++ b/xlators/features/changelog/src/changelog-mem-types.h
@@ -23,12 +23,11 @@ enum gf_changelog_mem_types {
gf_changelog_mt_libgfchangelog_t = gf_common_mt_end + 7,
gf_changelog_mt_libgfchangelog_entry_t = gf_common_mt_end + 8,
gf_changelog_mt_libgfchangelog_rl_t = gf_common_mt_end + 9,
- gf_changelog_mt_libgfchangelog_dirent_t = gf_common_mt_end + 10,
- gf_changelog_mt_changelog_buffer_t = gf_common_mt_end + 11,
- gf_changelog_mt_history_data_t = gf_common_mt_end + 12,
- gf_changelog_mt_libgfchangelog_call_pool_t = gf_common_mt_end + 13,
- gf_changelog_mt_libgfchangelog_event_t = gf_common_mt_end + 14,
- gf_changelog_mt_ev_dispatcher_t = gf_common_mt_end + 15,
+ gf_changelog_mt_changelog_buffer_t = gf_common_mt_end + 10,
+ gf_changelog_mt_history_data_t = gf_common_mt_end + 11,
+ gf_changelog_mt_libgfchangelog_call_pool_t = gf_common_mt_end + 12,
+ gf_changelog_mt_libgfchangelog_event_t = gf_common_mt_end + 13,
+ gf_changelog_mt_ev_dispatcher_t = gf_common_mt_end + 14,
gf_changelog_mt_end
};