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authorJakub Hrozek <jhrozek@redhat.com>2013-01-15 09:20:47 +0100
committerJakub Hrozek <jhrozek@redhat.com>2013-01-15 20:16:04 +0100
commit82dc11348718bf8e2ff07da696f91f6703293c24 (patch)
tree38fd40307e32d08394d21ac6bf9b4831687e52bf /src
parentd3957d8243a3425375728a3c77edcf722290bad9 (diff)
downloadsssd-82dc11348718bf8e2ff07da696f91f6703293c24.tar.gz
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TOOLS: move memcache related functions to tools_mc_utils.c
The upcoming patches will link only users of this file with client libs, so it's better to have it separate. There is no functional change in this patch
Diffstat (limited to 'src')
-rw-r--r--src/tools/tools_mc_util.c187
-rw-r--r--src/tools/tools_util.c161
-rw-r--r--src/tools/tools_util.h1
3 files changed, 188 insertions, 161 deletions
diff --git a/src/tools/tools_mc_util.c b/src/tools/tools_mc_util.c
new file mode 100644
index 00000000..5348829e
--- /dev/null
+++ b/src/tools/tools_mc_util.c
@@ -0,0 +1,187 @@
+/*
+ SSSD
+
+ tools_mc_util - interface to the memcache for userspace tools
+
+ Copyright (C) Red Hat 2013
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <talloc.h>
+#include <fcntl.h>
+
+#include "util/util.h"
+#include "tools/tools_util.h"
+#include "util/mmap_cache.h"
+
+static errno_t sss_mc_set_recycled(int fd)
+{
+ uint32_t w = SSS_MC_HEADER_RECYCLED;
+ struct sss_mc_header h;
+ off_t offset;
+ off_t pos;
+ int ret;
+
+
+ offset = MC_PTR_DIFF(&h.status, &h);
+
+ pos = lseek(fd, offset, SEEK_SET);
+ if (pos == -1) {
+ /* What do we do now ? */
+ return errno;
+ }
+
+ errno = 0;
+ ret = sss_atomic_write_s(fd, (uint8_t *)&w, sizeof(h.status));
+ if (ret == -1) {
+ return errno;
+ }
+
+ if (ret != sizeof(h.status)) {
+ /* Write error */
+ return EIO;
+ }
+
+ return EOK;
+}
+
+errno_t sss_memcache_invalidate(const char *mc_filename)
+{
+ int mc_fd = -1;
+ errno_t ret;
+ errno_t pret;
+ useconds_t t = 50000;
+ int retries = 2;
+
+ if (!mc_filename) {
+ return EINVAL;
+ }
+
+ mc_fd = open(mc_filename, O_RDWR);
+ if (mc_fd == -1) {
+ ret = errno;
+ if (ret == ENOENT) {
+ DEBUG(SSSDBG_TRACE_FUNC,("Memory cache file %s "
+ "does not exist.\n", mc_filename));
+ return EOK;
+ } else {
+ DEBUG(SSSDBG_CRIT_FAILURE, ("Unable to open file %s: %s\n",
+ mc_filename, strerror(ret)));
+ return ret;
+ }
+ }
+
+ ret = sss_br_lock_file(mc_fd, 0, 1, retries, t);
+ if (ret == EACCES) {
+ DEBUG(SSSDBG_TRACE_FUNC,
+ ("File %s already locked by someone else.\n", mc_filename));
+ goto done;
+ } else if (ret != EOK) {
+ DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to lock file %s.\n", mc_filename));
+ goto done;
+ }
+ /* Mark the mc file as recycled. */
+ ret = sss_mc_set_recycled(mc_fd);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to mark memory cache file %s "
+ "as recycled.\n", mc_filename));
+ goto done;
+ }
+
+ ret = EOK;
+done:
+ if (mc_fd != -1) {
+ /* Closing the file also releases the lock */
+ close(mc_fd);
+
+ /* Only unlink the file if invalidation was succesful */
+ if (ret == EOK) {
+ pret = unlink(mc_filename);
+ if (pret == -1) {
+ DEBUG(SSSDBG_MINOR_FAILURE,
+ ("Failed to unlink file %s. "
+ "Will be unlinked later by sssd_nss.\n"));
+ }
+ }
+ }
+ return ret;
+}
+
+static int clear_fastcache(bool *sssd_nss_is_off)
+{
+ int ret;
+ ret = sss_memcache_invalidate(SSS_NSS_MCACHE_DIR"/passwd");
+ if (ret != EOK) {
+ if (ret == EACCES) {
+ *sssd_nss_is_off = false;
+ return EOK;
+ } else {
+ return ret;
+ }
+ }
+
+ ret = sss_memcache_invalidate(SSS_NSS_MCACHE_DIR"/group");
+ if (ret != EOK) {
+ if (ret == EACCES) {
+ *sssd_nss_is_off = false;
+ return EOK;
+ } else {
+ return ret;
+ }
+ }
+
+ *sssd_nss_is_off = true;
+ return EOK;
+}
+
+errno_t sss_memcache_clear_all(void)
+{
+ errno_t ret;
+ bool sssd_nss_is_off = false;
+ FILE *clear_mc_flag;
+
+ ret = clear_fastcache(&sssd_nss_is_off);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to clear caches.\n"));
+ return EIO;
+ }
+ if (!sssd_nss_is_off) {
+ /* sssd_nss is running -> signal monitor to invalidate fastcache */
+ clear_mc_flag = fopen(SSS_NSS_MCACHE_DIR"/"CLEAR_MC_FLAG, "w");
+ if (clear_mc_flag == NULL) {
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ ("Failed to create clear_mc_flag file. "
+ "Memory cache will not be cleared.\n"));
+ return EIO;
+ }
+ ret = fclose(clear_mc_flag);
+ if (ret != 0) {
+ ret = errno;
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ ("Unable to close file descriptor: %s\n",
+ strerror(ret)));
+ return EIO;
+ }
+ DEBUG(SSSDBG_TRACE_FUNC, ("Sending SIGHUP to monitor.\n"));
+ ret = signal_sssd(SIGHUP);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ ("Failed to send SIGHUP to monitor.\n"));
+ return EIO;
+ }
+ }
+
+ return EOK;
+}
diff --git a/src/tools/tools_util.c b/src/tools/tools_util.c
index 9bb25457..c27b88a1 100644
--- a/src/tools/tools_util.c
+++ b/src/tools/tools_util.c
@@ -35,7 +35,6 @@
#include "db/sysdb.h"
#include "tools/tools_util.h"
#include "tools/sss_sync_ops.h"
-#include "util/mmap_cache.h"
static int setup_db(struct tools_ctx *ctx)
{
@@ -674,163 +673,3 @@ errno_t signal_sssd(int signum)
return EOK;
}
-
-static errno_t sss_mc_set_recycled(int fd)
-{
- uint32_t w = SSS_MC_HEADER_RECYCLED;
- struct sss_mc_header h;
- off_t offset;
- off_t pos;
- int ret;
-
-
- offset = MC_PTR_DIFF(&h.status, &h);
-
- pos = lseek(fd, offset, SEEK_SET);
- if (pos == -1) {
- /* What do we do now ? */
- return errno;
- }
-
- errno = 0;
- ret = sss_atomic_write_s(fd, (uint8_t *)&w, sizeof(h.status));
- if (ret == -1) {
- return errno;
- }
-
- if (ret != sizeof(h.status)) {
- /* Write error */
- return EIO;
- }
-
- return EOK;
-}
-
-errno_t sss_memcache_invalidate(const char *mc_filename)
-{
- int mc_fd = -1;
- errno_t ret;
- errno_t pret;
- useconds_t t = 50000;
- int retries = 2;
-
- if (!mc_filename) {
- return EINVAL;
- }
-
- mc_fd = open(mc_filename, O_RDWR);
- if (mc_fd == -1) {
- ret = errno;
- if (ret == ENOENT) {
- DEBUG(SSSDBG_TRACE_FUNC,("Memory cache file %s "
- "does not exist.\n", mc_filename));
- return EOK;
- } else {
- DEBUG(SSSDBG_CRIT_FAILURE, ("Unable to open file %s: %s\n",
- mc_filename, strerror(ret)));
- return ret;
- }
- }
-
- ret = sss_br_lock_file(mc_fd, 0, 1, retries, t);
- if (ret == EACCES) {
- DEBUG(SSSDBG_TRACE_FUNC,
- ("File %s already locked by someone else.\n", mc_filename));
- goto done;
- } else if (ret != EOK) {
- DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to lock file %s.\n", mc_filename));
- goto done;
- }
- /* Mark the mc file as recycled. */
- ret = sss_mc_set_recycled(mc_fd);
- if (ret != EOK) {
- DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to mark memory cache file %s "
- "as recycled.\n", mc_filename));
- goto done;
- }
-
- ret = EOK;
-done:
- if (mc_fd != -1) {
- /* Closing the file also releases the lock */
- close(mc_fd);
-
- /* Only unlink the file if invalidation was succesful */
- if (ret == EOK) {
- pret = unlink(mc_filename);
- if (pret == -1) {
- DEBUG(SSSDBG_MINOR_FAILURE,
- ("Failed to unlink file %s. "
- "Will be unlinked later by sssd_nss.\n"));
- }
- }
- }
- return ret;
-}
-
-static int clear_fastcache(bool *sssd_nss_is_off)
-{
- int ret;
- ret = sss_memcache_invalidate(SSS_NSS_MCACHE_DIR"/passwd");
- if (ret != EOK) {
- if (ret == EACCES) {
- *sssd_nss_is_off = false;
- return EOK;
- } else {
- return ret;
- }
- }
-
- ret = sss_memcache_invalidate(SSS_NSS_MCACHE_DIR"/group");
- if (ret != EOK) {
- if (ret == EACCES) {
- *sssd_nss_is_off = false;
- return EOK;
- } else {
- return ret;
- }
- }
-
- *sssd_nss_is_off = true;
- return EOK;
-}
-
-errno_t sss_memcache_clear_all(void)
-{
- errno_t ret;
- bool sssd_nss_is_off = false;
- FILE *clear_mc_flag;
-
- ret = clear_fastcache(&sssd_nss_is_off);
- if (ret != EOK) {
- DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to clear caches.\n"));
- return EIO;
- }
- if (!sssd_nss_is_off) {
- /* sssd_nss is running -> signal monitor to invalidate fastcache */
- clear_mc_flag = fopen(SSS_NSS_MCACHE_DIR"/"CLEAR_MC_FLAG, "w");
- if (clear_mc_flag == NULL) {
- DEBUG(SSSDBG_CRIT_FAILURE,
- ("Failed to create clear_mc_flag file. "
- "Memory cache will not be cleared.\n"));
- return EIO;
- }
- ret = fclose(clear_mc_flag);
- if (ret != 0) {
- ret = errno;
- DEBUG(SSSDBG_CRIT_FAILURE,
- ("Unable to close file descriptor: %s\n",
- strerror(ret)));
- return EIO;
- }
- DEBUG(SSSDBG_TRACE_FUNC, ("Sending SIGHUP to monitor.\n"));
- ret = signal_sssd(SIGHUP);
- if (ret != EOK) {
- DEBUG(SSSDBG_CRIT_FAILURE,
- ("Failed to send SIGHUP to monitor.\n"));
- return EIO;
- }
- }
-
- return EOK;
-}
diff --git a/src/tools/tools_util.h b/src/tools/tools_util.h
index 20a2a4af..aa55bfaf 100644
--- a/src/tools/tools_util.h
+++ b/src/tools/tools_util.h
@@ -104,6 +104,7 @@ int run_userdel_cmd(struct tools_ctx *tctx);
errno_t signal_sssd(int signum);
+/* tools_mc_util.c */
errno_t sss_memcache_invalidate(const char *mc_filename);
errno_t sss_memcache_clear_all(void);