summaryrefslogtreecommitdiffstats
path: root/xlators/debug/io-stats/src
diff options
context:
space:
mode:
authorAmar Tumballi <amarts@redhat.com>2018-07-24 15:42:28 +0530
committerAmar Tumballi <amarts@redhat.com>2018-09-05 09:24:52 +0000
commit9716ce88b3a1faf135a6badc02d94249898059dd (patch)
tree330945b605643c7c7b371e240cb7719be85a4dd7 /xlators/debug/io-stats/src
parent35f86ce46240c4f9c216bbc29164ce441cfca1e7 (diff)
io-stats: dump io-stats info in /var/run/gluster
It wouldn't make sense to allow iostats file to be written in *any* directory. While the formating makes sure we try to append io-stats-name for the file, so overwriting existing file is slim, but in any case it makes sense to restrict dumping to one directory. Below are the sample commands, and files created for the corresponding values: $ setfattr -n trusted.io-stats-dump -v file-for-dump $M0 In this case, the file would be in /var/run/gluster/file-for-dump $ setfattr -n trusted.io-stats-dump -v /dir1/dir2/file-for-dump $M0 In this case, then the dump file is in /var/run/gluster/dir1-dir2-file-for-dump Note that the value passed for this virtual xattr would be treated as a file, and even if the value has '/' in it, it would be changed to '-' for sanity. Fixes: bz#1625106 Change-Id: Id9ae6a40a190b8937c51662e6e1c2a0f6c86a0e0 Signed-off-by: Amar Tumballi <amarts@redhat.com>
Diffstat (limited to 'xlators/debug/io-stats/src')
-rw-r--r--xlators/debug/io-stats/src/io-stats.c34
1 files changed, 25 insertions, 9 deletions
diff --git a/xlators/debug/io-stats/src/io-stats.c b/xlators/debug/io-stats/src/io-stats.c
index 7a7a921..4bc8b79 100644
--- a/xlators/debug/io-stats/src/io-stats.c
+++ b/xlators/debug/io-stats/src/io-stats.c
@@ -46,6 +46,8 @@
#define DEFAULT_GRP_BUF_SZ 16384
#define IOS_BLOCK_COUNT_SIZE 32
+#define IOS_STATS_DUMP_DIR DEFAULT_VAR_RUN_DIRECTORY
+
typedef enum {
IOS_STATS_TYPE_NONE,
IOS_STATS_TYPE_OPEN,
@@ -3054,7 +3056,6 @@ io_stats_fsync (call_frame_t *frame, xlator_t *this,
return 0;
}
-
int
conditional_dump (dict_t *dict, char *key, data_t *value, void *data)
{
@@ -3067,9 +3068,10 @@ conditional_dump (dict_t *dict, char *key, data_t *value, void *data)
char *filename = NULL;
FILE *logfp = NULL;
struct ios_dump_args args = {0};
- int pid, namelen;
+ int pid, namelen, dirlen;
char dump_key[100];
char *slash_ptr = NULL;
+ char *path_in_value = NULL;
stub = data;
this = stub->this;
@@ -3078,16 +3080,30 @@ conditional_dump (dict_t *dict, char *key, data_t *value, void *data)
name as well. This helps when there is more than a single io-stats
instance in the graph, or the client and server processes are running
on the same node */
- /* hmmm... no check for this */
- /* name format: <passed in path/filename>.<xlator name slashes to -> */
- namelen = value->len + strlen (this->name) + 2; /* '.' and '\0' */
+ /* For the sanity of where the file should be located, we should make
+ sure file is written only inside RUNDIR (ie, /var/run/gluster) */
+ /* TODO: provide an option to dump it to different directory of
+ choice, based on options */
+ /* name format: /var/run/gluster/<passed in path/filename>.<xlator name slashes to -> */
+
+ path_in_value = data_to_str (value);
+
+ if (strstr (path_in_value, "../")) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "%s: no \"../\" allowed in path", path_in_value);
+ return -1;
+ }
+ dirlen = strlen (IOS_STATS_DUMP_DIR);
+ namelen = (dirlen + value->len + strlen (this->name) + 3);
+ /* +3 for '/', '.' and '\0' added in snprintf below*/
+
filename = alloca0 (namelen);
- memcpy (filename, data_to_str (value), value->len);
- memcpy (filename + value->len, ".", 1);
- memcpy (filename + value->len + 1, this->name, strlen(this->name));
+
+ snprintf (filename, namelen, "%s/%s.%s", IOS_STATS_DUMP_DIR,
+ path_in_value, this->name);
/* convert any slashes to '-' so that fopen works correctly */
- slash_ptr = strchr (filename + value->len + 1, '/');
+ slash_ptr = strchr (filename + dirlen + 1, '/');
while (slash_ptr) {
*slash_ptr = '-';
slash_ptr = strchr (slash_ptr, '/');