diff options
author | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-06-02 02:39:00 -0400 |
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committer | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-06-02 02:39:00 -0400 |
commit | d2556f9977122552e1b6ba4a233a500ce86b1343 (patch) | |
tree | bbf022e36d34013eb4a9c58a247db9d7445f7497 /src/journal/journal-vacuum.c | |
parent | a422a6a26da229bd168815958d55a582188f40bb (diff) |
get libsystemd-journal-internal building
Diffstat (limited to 'src/journal/journal-vacuum.c')
-rw-r--r-- | src/journal/journal-vacuum.c | 349 |
1 files changed, 0 insertions, 349 deletions
diff --git a/src/journal/journal-vacuum.c b/src/journal/journal-vacuum.c deleted file mode 100644 index 3650ab3865..0000000000 --- a/src/journal/journal-vacuum.c +++ /dev/null @@ -1,349 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2011 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <fcntl.h> -#include <sys/stat.h> -#include <unistd.h> - -#include <systemd/sd-id128.h> - -#include "alloc-util.h" -#include "dirent-util.h" -#include "fd-util.h" -#include "journal-def.h" -#include "journal-file.h" -#include "journal-vacuum.h" -#include "parse-util.h" -#include "string-util.h" -#include "util.h" -#include "xattr-util.h" - -struct vacuum_info { - uint64_t usage; - char *filename; - - uint64_t realtime; - - sd_id128_t seqnum_id; - uint64_t seqnum; - bool have_seqnum; -}; - -static int vacuum_compare(const void *_a, const void *_b) { - const struct vacuum_info *a, *b; - - a = _a; - b = _b; - - if (a->have_seqnum && b->have_seqnum && - sd_id128_equal(a->seqnum_id, b->seqnum_id)) { - if (a->seqnum < b->seqnum) - return -1; - else if (a->seqnum > b->seqnum) - return 1; - else - return 0; - } - - if (a->realtime < b->realtime) - return -1; - else if (a->realtime > b->realtime) - return 1; - else if (a->have_seqnum && b->have_seqnum) - return memcmp(&a->seqnum_id, &b->seqnum_id, 16); - else - return strcmp(a->filename, b->filename); -} - -static void patch_realtime( - int fd, - const char *fn, - const struct stat *st, - unsigned long long *realtime) { - - usec_t x, crtime = 0; - - /* The timestamp was determined by the file name, but let's - * see if the file might actually be older than the file name - * suggested... */ - - assert(fd >= 0); - assert(fn); - assert(st); - assert(realtime); - - x = timespec_load(&st->st_ctim); - if (x > 0 && x != USEC_INFINITY && x < *realtime) - *realtime = x; - - x = timespec_load(&st->st_atim); - if (x > 0 && x != USEC_INFINITY && x < *realtime) - *realtime = x; - - x = timespec_load(&st->st_mtim); - if (x > 0 && x != USEC_INFINITY && x < *realtime) - *realtime = x; - - /* Let's read the original creation time, if possible. Ideally - * we'd just query the creation time the FS might provide, but - * unfortunately there's currently no sane API to query - * it. Hence let's implement this manually... */ - - if (fd_getcrtime_at(fd, fn, &crtime, 0) >= 0) { - if (crtime < *realtime) - *realtime = crtime; - } -} - -static int journal_file_empty(int dir_fd, const char *name) { - _cleanup_close_ int fd; - struct stat st; - le64_t n_entries; - ssize_t n; - - fd = openat(dir_fd, name, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK|O_NOATIME); - if (fd < 0) { - /* Maybe failed due to O_NOATIME and lack of privileges? */ - fd = openat(dir_fd, name, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK); - if (fd < 0) - return -errno; - } - - if (fstat(fd, &st) < 0) - return -errno; - - /* If an offline file doesn't even have a header we consider it empty */ - if (st.st_size < (off_t) sizeof(Header)) - return 1; - - /* If the number of entries is empty, we consider it empty, too */ - n = pread(fd, &n_entries, sizeof(n_entries), offsetof(Header, n_entries)); - if (n < 0) - return -errno; - if (n != sizeof(n_entries)) - return -EIO; - - return le64toh(n_entries) <= 0; -} - -int journal_directory_vacuum( - const char *directory, - uint64_t max_use, - uint64_t n_max_files, - usec_t max_retention_usec, - usec_t *oldest_usec, - bool verbose) { - - _cleanup_closedir_ DIR *d = NULL; - struct vacuum_info *list = NULL; - unsigned n_list = 0, i, n_active_files = 0; - size_t n_allocated = 0; - uint64_t sum = 0, freed = 0; - usec_t retention_limit = 0; - char sbytes[FORMAT_BYTES_MAX]; - struct dirent *de; - int r; - - assert(directory); - - if (max_use <= 0 && max_retention_usec <= 0 && n_max_files <= 0) - return 0; - - if (max_retention_usec > 0) { - retention_limit = now(CLOCK_REALTIME); - if (retention_limit > max_retention_usec) - retention_limit -= max_retention_usec; - else - max_retention_usec = retention_limit = 0; - } - - d = opendir(directory); - if (!d) - return -errno; - - FOREACH_DIRENT_ALL(de, d, r = -errno; goto finish) { - - unsigned long long seqnum = 0, realtime; - _cleanup_free_ char *p = NULL; - sd_id128_t seqnum_id; - bool have_seqnum; - uint64_t size; - struct stat st; - size_t q; - - if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { - log_debug_errno(errno, "Failed to stat file %s while vacuuming, ignoring: %m", de->d_name); - continue; - } - - if (!S_ISREG(st.st_mode)) - continue; - - q = strlen(de->d_name); - - if (endswith(de->d_name, ".journal")) { - - /* Vacuum archived files. Active files are - * left around */ - - if (q < 1 + 32 + 1 + 16 + 1 + 16 + 8) { - n_active_files++; - continue; - } - - if (de->d_name[q-8-16-1] != '-' || - de->d_name[q-8-16-1-16-1] != '-' || - de->d_name[q-8-16-1-16-1-32-1] != '@') { - n_active_files++; - continue; - } - - p = strdup(de->d_name); - if (!p) { - r = -ENOMEM; - goto finish; - } - - de->d_name[q-8-16-1-16-1] = 0; - if (sd_id128_from_string(de->d_name + q-8-16-1-16-1-32, &seqnum_id) < 0) { - n_active_files++; - continue; - } - - if (sscanf(de->d_name + q-8-16-1-16, "%16llx-%16llx.journal", &seqnum, &realtime) != 2) { - n_active_files++; - continue; - } - - have_seqnum = true; - - } else if (endswith(de->d_name, ".journal~")) { - unsigned long long tmp; - - /* Vacuum corrupted files */ - - if (q < 1 + 16 + 1 + 16 + 8 + 1) { - n_active_files ++; - continue; - } - - if (de->d_name[q-1-8-16-1] != '-' || - de->d_name[q-1-8-16-1-16-1] != '@') { - n_active_files ++; - continue; - } - - p = strdup(de->d_name); - if (!p) { - r = -ENOMEM; - goto finish; - } - - if (sscanf(de->d_name + q-1-8-16-1-16, "%16llx-%16llx.journal~", &realtime, &tmp) != 2) { - n_active_files ++; - continue; - } - - have_seqnum = false; - } else { - /* We do not vacuum unknown files! */ - log_debug("Not vacuuming unknown file %s.", de->d_name); - continue; - } - - size = 512UL * (uint64_t) st.st_blocks; - - r = journal_file_empty(dirfd(d), p); - if (r < 0) { - log_debug_errno(r, "Failed check if %s is empty, ignoring: %m", p); - continue; - } - if (r > 0) { - /* Always vacuum empty non-online files. */ - - if (unlinkat(dirfd(d), p, 0) >= 0) { - - log_full(verbose ? LOG_INFO : LOG_DEBUG, - "Deleted empty archived journal %s/%s (%s).", directory, p, format_bytes(sbytes, sizeof(sbytes), size)); - - freed += size; - } else if (errno != ENOENT) - log_warning_errno(errno, "Failed to delete empty archived journal %s/%s: %m", directory, p); - - continue; - } - - patch_realtime(dirfd(d), p, &st, &realtime); - - if (!GREEDY_REALLOC(list, n_allocated, n_list + 1)) { - r = -ENOMEM; - goto finish; - } - - list[n_list].filename = p; - list[n_list].usage = size; - list[n_list].seqnum = seqnum; - list[n_list].realtime = realtime; - list[n_list].seqnum_id = seqnum_id; - list[n_list].have_seqnum = have_seqnum; - n_list ++; - - p = NULL; - sum += size; - } - - qsort_safe(list, n_list, sizeof(struct vacuum_info), vacuum_compare); - - for (i = 0; i < n_list; i++) { - unsigned left; - - left = n_active_files + n_list - i; - - if ((max_retention_usec <= 0 || list[i].realtime >= retention_limit) && - (max_use <= 0 || sum <= max_use) && - (n_max_files <= 0 || left <= n_max_files)) - break; - - if (unlinkat(dirfd(d), list[i].filename, 0) >= 0) { - log_full(verbose ? LOG_INFO : LOG_DEBUG, "Deleted archived journal %s/%s (%s).", directory, list[i].filename, format_bytes(sbytes, sizeof(sbytes), list[i].usage)); - freed += list[i].usage; - - if (list[i].usage < sum) - sum -= list[i].usage; - else - sum = 0; - - } else if (errno != ENOENT) - log_warning_errno(errno, "Failed to delete archived journal %s/%s: %m", directory, list[i].filename); - } - - if (oldest_usec && i < n_list && (*oldest_usec == 0 || list[i].realtime < *oldest_usec)) - *oldest_usec = list[i].realtime; - - r = 0; - -finish: - for (i = 0; i < n_list; i++) - free(list[i].filename); - free(list); - - log_full(verbose ? LOG_INFO : LOG_DEBUG, "Vacuuming done, freed %s of archived journals on disk.", format_bytes(sbytes, sizeof(sbytes), freed)); - - return r; -} |