diff options
Diffstat (limited to 'collectors/proc.plugin/proc_self_mountinfo.c')
| -rw-r--r-- | collectors/proc.plugin/proc_self_mountinfo.c | 471 |
1 files changed, 0 insertions, 471 deletions
diff --git a/collectors/proc.plugin/proc_self_mountinfo.c b/collectors/proc.plugin/proc_self_mountinfo.c deleted file mode 100644 index 194791603..000000000 --- a/collectors/proc.plugin/proc_self_mountinfo.c +++ /dev/null @@ -1,471 +0,0 @@ -// SPDX-License-Identifier: GPL-3.0-or-later - -#include "plugin_proc.h" - -// ---------------------------------------------------------------------------- -// taken from gnulib/mountlist.c - -#ifndef ME_REMOTE -/* A file system is "remote" if its Fs_name contains a ':' - or if (it is of type (smbfs or cifs) and its Fs_name starts with '//') - or Fs_name is equal to "-hosts" (used by autofs to mount remote fs). */ -# define ME_REMOTE(Fs_name, Fs_type) \ - (strchr (Fs_name, ':') != NULL \ - || ((Fs_name)[0] == '/' \ - && (Fs_name)[1] == '/' \ - && (strcmp (Fs_type, "smbfs") == 0 \ - || strcmp (Fs_type, "cifs") == 0)) \ - || (strcmp("-hosts", Fs_name) == 0)) -#endif - -#define ME_DUMMY_0(Fs_name, Fs_type) \ - (strcmp (Fs_type, "autofs") == 0 \ - || strcmp (Fs_type, "proc") == 0 \ - || strcmp (Fs_type, "subfs") == 0 \ - /* for Linux 2.6/3.x */ \ - || strcmp (Fs_type, "debugfs") == 0 \ - || strcmp (Fs_type, "devpts") == 0 \ - || strcmp (Fs_type, "fusectl") == 0 \ - || strcmp (Fs_type, "mqueue") == 0 \ - || strcmp (Fs_type, "rpc_pipefs") == 0 \ - || strcmp (Fs_type, "sysfs") == 0 \ - /* FreeBSD, Linux 2.4 */ \ - || strcmp (Fs_type, "devfs") == 0 \ - /* for NetBSD 3.0 */ \ - || strcmp (Fs_type, "kernfs") == 0 \ - /* for Irix 6.5 */ \ - || strcmp (Fs_type, "ignore") == 0) - -/* Historically, we have marked as "dummy" any file system of type "none", - but now that programs like du need to know about bind-mounted directories, - we grant an exception to any with "bind" in its list of mount options. - I.e., those are *not* dummy entries. */ -# define ME_DUMMY(Fs_name, Fs_type) \ - (ME_DUMMY_0 (Fs_name, Fs_type) || strcmp (Fs_type, "none") == 0) - -// ---------------------------------------------------------------------------- - -// find the mount info with the given major:minor -// in the supplied linked list of mountinfo structures -struct mountinfo *mountinfo_find(struct mountinfo *root, unsigned long major, unsigned long minor, char *device) { - struct mountinfo *mi; - - uint32_t hash = simple_hash(device); - - for(mi = root; mi ; mi = mi->next) - if (unlikely( - mi->major == major && - mi->minor == minor && - mi->mount_source_name_hash == hash && - !strcmp(mi->mount_source_name, device))) - return mi; - - return NULL; -} - -// find the mount info with the given filesystem and mount_source -// in the supplied linked list of mountinfo structures -struct mountinfo *mountinfo_find_by_filesystem_mount_source(struct mountinfo *root, const char *filesystem, const char *mount_source) { - struct mountinfo *mi; - uint32_t filesystem_hash = simple_hash(filesystem), mount_source_hash = simple_hash(mount_source); - - for(mi = root; mi ; mi = mi->next) - if(unlikely(mi->filesystem - && mi->mount_source - && mi->filesystem_hash == filesystem_hash - && mi->mount_source_hash == mount_source_hash - && !strcmp(mi->filesystem, filesystem) - && !strcmp(mi->mount_source, mount_source))) - return mi; - - return NULL; -} - -struct mountinfo *mountinfo_find_by_filesystem_super_option(struct mountinfo *root, const char *filesystem, const char *super_options) { - struct mountinfo *mi; - uint32_t filesystem_hash = simple_hash(filesystem); - - size_t solen = strlen(super_options); - - for(mi = root; mi ; mi = mi->next) - if(unlikely(mi->filesystem - && mi->super_options - && mi->filesystem_hash == filesystem_hash - && !strcmp(mi->filesystem, filesystem))) { - - // super_options is a comma separated list - char *s = mi->super_options, *e; - while(*s) { - e = s + 1; - while(*e && *e != ',') e++; - - size_t len = e - s; - if(unlikely(len == solen && !strncmp(s, super_options, len))) - return mi; - - if(*e == ',') s = ++e; - else s = e; - } - } - - return NULL; -} - -static void mountinfo_free(struct mountinfo *mi) { - freez(mi->root); - freez(mi->mount_point); - freez(mi->mount_options); - freez(mi->persistent_id); -/* - if(mi->optional_fields_count) { - int i; - for(i = 0; i < mi->optional_fields_count ; i++) - free(*mi->optional_fields[i]); - } - free(mi->optional_fields); -*/ - freez(mi->filesystem); - freez(mi->mount_source); - freez(mi->mount_source_name); - freez(mi->super_options); - freez(mi); -} - -// free a linked list of mountinfo structures -void mountinfo_free_all(struct mountinfo *mi) { - while(mi) { - struct mountinfo *t = mi; - mi = mi->next; - - mountinfo_free(t); - } -} - -static char *strdupz_decoding_octal(const char *string) { - char *buffer = strdupz(string); - - char *d = buffer; - const char *s = string; - - while(*s) { - if(unlikely(*s == '\\')) { - s++; - if(likely(isdigit(*s) && isdigit(s[1]) && isdigit(s[2]))) { - char c = *s++ - '0'; - c <<= 3; - c |= *s++ - '0'; - c <<= 3; - c |= *s++ - '0'; - *d++ = c; - } - else *d++ = '_'; - } - else *d++ = *s++; - } - *d = '\0'; - - return buffer; -} - -static inline int is_read_only(const char *s) { - if(!s) return 0; - - size_t len = strlen(s); - if(len < 2) return 0; - if(len == 2) { - if(!strcmp(s, "ro")) return 1; - return 0; - } - if(!strncmp(s, "ro,", 3)) return 1; - if(!strncmp(&s[len - 3], ",ro", 3)) return 1; - if(strstr(s, ",ro,")) return 1; - return 0; -} - -// for the full list of protected mount points look at -// https://github.com/systemd/systemd/blob/1eb3ef78b4df28a9e9f464714208f2682f957e36/src/core/namespace.c#L142-L149 -// https://github.com/systemd/systemd/blob/1eb3ef78b4df28a9e9f464714208f2682f957e36/src/core/namespace.c#L180-L194 -static const char *systemd_protected_mount_points[] = { - "/home", - "/root", - "/usr", - "/boot", - "/efi", - "/etc", - "/run/user", - "/lib", - "/lib64", - "/bin", - "/sbin", - NULL -}; - -static inline int mount_point_is_protected(char *mount_point) -{ - for (size_t i = 0; systemd_protected_mount_points[i] != NULL; i++) - if (!strcmp(mount_point, systemd_protected_mount_points[i])) - return 1; - - return 0; -} - -// read the whole mountinfo into a linked list -struct mountinfo *mountinfo_read(int do_statvfs) { - char filename[FILENAME_MAX + 1]; - snprintfz(filename, FILENAME_MAX, "%s/proc/self/mountinfo", netdata_configured_host_prefix); - procfile *ff = procfile_open(filename, " \t", PROCFILE_FLAG_DEFAULT); - if(unlikely(!ff)) { - snprintfz(filename, FILENAME_MAX, "%s/proc/1/mountinfo", netdata_configured_host_prefix); - ff = procfile_open(filename, " \t", PROCFILE_FLAG_DEFAULT); - if(unlikely(!ff)) return NULL; - } - - ff = procfile_readall(ff); - if(unlikely(!ff)) - return NULL; - - struct mountinfo *root = NULL, *last = NULL, *mi = NULL; - - // create a dictionary to track uniqueness - DICTIONARY *dict = dictionary_create_advanced( - DICT_OPTION_SINGLE_THREADED | DICT_OPTION_DONT_OVERWRITE_VALUE | DICT_OPTION_NAME_LINK_DONT_CLONE, - &dictionary_stats_category_collectors, 0); - - unsigned long l, lines = procfile_lines(ff); - for(l = 0; l < lines ;l++) { - if(unlikely(procfile_linewords(ff, l) < 5)) - continue; - - // make sure we don't add the same item twice - char *v = (char *)dictionary_set(dict, procfile_lineword(ff, l, 4), "N", 2); - if(v) { - if(*v == 'O') continue; - *v = 'O'; - } - - mi = mallocz(sizeof(struct mountinfo)); - - unsigned long w = 0; - mi->id = str2ul(procfile_lineword(ff, l, w)); w++; - mi->parentid = str2ul(procfile_lineword(ff, l, w)); w++; - - char *major = procfile_lineword(ff, l, w), *minor; w++; - for(minor = major; *minor && *minor != ':' ;minor++) ; - - if(unlikely(!*minor)) { - collector_error("Cannot parse major:minor on '%s' at line %lu of '%s'", major, l + 1, filename); - freez(mi); - continue; - } - - *minor = '\0'; - minor++; - - mi->flags = 0; - - mi->major = str2ul(major); - mi->minor = str2ul(minor); - - mi->root = strdupz(procfile_lineword(ff, l, w)); w++; - mi->root_hash = simple_hash(mi->root); - - mi->mount_point = strdupz_decoding_octal(procfile_lineword(ff, l, w)); w++; - mi->mount_point_hash = simple_hash(mi->mount_point); - - mi->persistent_id = strdupz(mi->mount_point); - netdata_fix_chart_id(mi->persistent_id); - mi->persistent_id_hash = simple_hash(mi->persistent_id); - - mi->mount_options = strdupz(procfile_lineword(ff, l, w)); w++; - - if(unlikely(is_read_only(mi->mount_options))) - mi->flags |= MOUNTINFO_READONLY; - - if(unlikely(mount_point_is_protected(mi->mount_point))) - mi->flags |= MOUNTINFO_IS_IN_SYSD_PROTECTED_LIST; - - // count the optional fields -/* - unsigned long wo = w; -*/ - mi->optional_fields_count = 0; - char *s = procfile_lineword(ff, l, w); - while(*s && *s != '-') { - w++; - s = procfile_lineword(ff, l, w); - mi->optional_fields_count++; - } - -/* - if(unlikely(mi->optional_fields_count)) { - // we have some optional fields - // read them into a new array of pointers; - - mi->optional_fields = mallocz(mi->optional_fields_count * sizeof(char *)); - - int i; - for(i = 0; i < mi->optional_fields_count ; i++) { - *mi->optional_fields[wo] = strdupz(procfile_lineword(ff, l, w)); - wo++; - } - } - else - mi->optional_fields = NULL; -*/ - - if(likely(*s == '-')) { - w++; - - mi->filesystem = strdupz(procfile_lineword(ff, l, w)); w++; - mi->filesystem_hash = simple_hash(mi->filesystem); - - mi->mount_source = strdupz_decoding_octal(procfile_lineword(ff, l, w)); w++; - mi->mount_source_hash = simple_hash(mi->mount_source); - - mi->mount_source_name = strdupz(basename(mi->mount_source)); - mi->mount_source_name_hash = simple_hash(mi->mount_source_name); - - mi->super_options = strdupz(procfile_lineword(ff, l, w)); w++; - - if(unlikely(is_read_only(mi->super_options))) - mi->flags |= MOUNTINFO_READONLY; - - if(unlikely(ME_DUMMY(mi->mount_source, mi->filesystem))) - mi->flags |= MOUNTINFO_IS_DUMMY; - - if(unlikely(ME_REMOTE(mi->mount_source, mi->filesystem))) - mi->flags |= MOUNTINFO_IS_REMOTE; - - // mark as BIND the duplicates (i.e. same filesystem + same source) - if(do_statvfs) { - struct stat buf; - if(unlikely(stat(mi->mount_point, &buf) == -1)) { - mi->st_dev = 0; - mi->flags |= MOUNTINFO_NO_STAT; - } - else { - mi->st_dev = buf.st_dev; - - struct mountinfo *mt; - for(mt = root; mt; mt = mt->next) { - if(unlikely(mt->st_dev == mi->st_dev && !(mt->flags & MOUNTINFO_IS_SAME_DEV))) { - if(strlen(mi->mount_point) < strlen(mt->mount_point)) - mt->flags |= MOUNTINFO_IS_SAME_DEV; - else - mi->flags |= MOUNTINFO_IS_SAME_DEV; - } - } - } - } - else { - mi->st_dev = 0; - } - - //try to detect devices with same minor and major modes. Within these, - //the larger mount point is considered a bind. - struct mountinfo *mt; - for(mt = root; mt; mt = mt->next) { - if(unlikely(mt->major == mi->major && mt->minor == mi->minor && !(mi->flags & MOUNTINFO_IS_BIND))) { - if(strlen(mi->root) < strlen(mt->root)) - mt->flags |= MOUNTINFO_IS_BIND; - else - mi->flags |= MOUNTINFO_IS_BIND; - } - } - } - else { - mi->filesystem = NULL; - mi->filesystem_hash = 0; - - mi->mount_source = NULL; - mi->mount_source_hash = 0; - - mi->mount_source_name = NULL; - mi->mount_source_name_hash = 0; - - mi->super_options = NULL; - - mi->st_dev = 0; - } - - // check if it has size - if(do_statvfs && !(mi->flags & MOUNTINFO_IS_DUMMY)) { - struct statvfs buff_statvfs; - if(unlikely(statvfs(mi->mount_point, &buff_statvfs) < 0)) { - mi->flags |= MOUNTINFO_NO_STAT; - } - else if(unlikely(!buff_statvfs.f_blocks /* || !buff_statvfs.f_files */)) { - mi->flags |= MOUNTINFO_NO_SIZE; - } - } - - // link it - if(unlikely(!root)) - root = mi; - else - last->next = mi; - - last = mi; - mi->next = NULL; - -/* -#ifdef NETDATA_INTERNAL_CHECKS - fprintf(stderr, "MOUNTINFO: %ld %ld %lu:%lu root '%s', persistent id '%s', mount point '%s', mount options '%s', filesystem '%s', mount source '%s', super options '%s'%s%s%s%s%s%s\n", - mi->id, - mi->parentid, - mi->major, - mi->minor, - mi->root, - mi->persistent_id, - (mi->mount_point)?mi->mount_point:"", - (mi->mount_options)?mi->mount_options:"", - (mi->filesystem)?mi->filesystem:"", - (mi->mount_source)?mi->mount_source:"", - (mi->super_options)?mi->super_options:"", - (mi->flags & MOUNTINFO_IS_DUMMY)?" DUMMY":"", - (mi->flags & MOUNTINFO_IS_BIND)?" BIND":"", - (mi->flags & MOUNTINFO_IS_REMOTE)?" REMOTE":"", - (mi->flags & MOUNTINFO_NO_STAT)?" NOSTAT":"", - (mi->flags & MOUNTINFO_NO_SIZE)?" NOSIZE":"", - (mi->flags & MOUNTINFO_IS_SAME_DEV)?" SAMEDEV":"" - ); -#endif -*/ - } - -/* find if the mount options have "bind" in them - { - FILE *fp = setmntent(MOUNTED, "r"); - if (fp != NULL) { - struct mntent mntbuf; - struct mntent *mnt; - char buf[4096 + 1]; - - while ((mnt = getmntent_r(fp, &mntbuf, buf, 4096))) { - char *bind = hasmntopt(mnt, "bind"); - if(unlikely(bind)) { - struct mountinfo *mi; - for(mi = root; mi ; mi = mi->next) { - if(unlikely(strcmp(mnt->mnt_dir, mi->mount_point) == 0)) { - fprintf(stderr, "Mount point '%s' is BIND\n", mi->mount_point); - mi->flags |= MOUNTINFO_IS_BIND; - break; - } - } - -#ifdef NETDATA_INTERNAL_CHECKS - if(unlikely(!mi)) { - collector_error("Mount point '%s' not found in /proc/self/mountinfo", mnt->mnt_dir); - } -#endif - } - } - endmntent(fp); - } - } -*/ - - dictionary_destroy(dict); - procfile_close(ff); - return root; -} |