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Diffstat (limited to 'src/journal/sd-journal.c')
-rw-r--r--src/journal/sd-journal.c259
1 files changed, 220 insertions, 39 deletions
diff --git a/src/journal/sd-journal.c b/src/journal/sd-journal.c
index 5104bc3e01..0798247326 100644
--- a/src/journal/sd-journal.c
+++ b/src/journal/sd-journal.c
@@ -1233,14 +1233,37 @@ static bool file_type_wanted(int flags, const char *filename) {
return false;
}
-static int add_any_file(sd_journal *j, const char *path) {
+static bool path_has_prefix(sd_journal *j, const char *path, const char *prefix) {
+ assert(j);
+ assert(path);
+ assert(prefix);
+
+ if (j->toplevel_fd >= 0)
+ return false;
+
+ return path_startswith(path, prefix);
+}
+
+static const char *skip_slash(const char *p) {
+
+ if (!p)
+ return NULL;
+
+ while (*p == '/')
+ p++;
+
+ return p;
+}
+
+static int add_any_file(sd_journal *j, int fd, const char *path) {
JournalFile *f = NULL;
+ bool close_fd = false;
int r, k;
assert(j);
- assert(path);
+ assert(fd >= 0 || path);
- if (ordered_hashmap_get(j->files, path))
+ if (path && ordered_hashmap_get(j->files, path))
return 0;
if (ordered_hashmap_size(j->files) >= JOURNAL_FILES_MAX) {
@@ -1249,8 +1272,24 @@ static int add_any_file(sd_journal *j, const char *path) {
goto fail;
}
- r = journal_file_open(path, O_RDONLY, 0, false, false, NULL, j->mmap, NULL, NULL, &f);
+ if (fd < 0 && j->toplevel_fd >= 0) {
+
+ /* If there's a top-level fd defined, open the file relative to this now. (Make the path relative,
+ * explicitly, since otherwise openat() ignores the first argument.) */
+
+ fd = openat(j->toplevel_fd, skip_slash(path), O_RDONLY|O_CLOEXEC);
+ if (fd < 0) {
+ r = log_debug_errno(errno, "Failed to open journal file %s: %m", path);
+ goto fail;
+ }
+
+ close_fd = true;
+ }
+
+ r = journal_file_open(fd, path, O_RDONLY, 0, false, false, NULL, j->mmap, NULL, NULL, &f);
if (r < 0) {
+ if (close_fd)
+ safe_close(fd);
log_debug_errno(r, "Failed to open journal file %s: %m", path);
goto fail;
}
@@ -1259,10 +1298,16 @@ static int add_any_file(sd_journal *j, const char *path) {
r = ordered_hashmap_put(j->files, f->path, f);
if (r < 0) {
+ f->close_fd = close_fd;
(void) journal_file_close(f);
goto fail;
}
+ if (!j->has_runtime_files && path_has_prefix(j, f->path, "/run"))
+ j->has_runtime_files = true;
+ else if (!j->has_persistent_files && path_has_prefix(j, f->path, "/var"))
+ j->has_persistent_files = true;
+
log_debug("File %s added.", f->path);
check_network(j, f->fd);
@@ -1286,18 +1331,14 @@ static int add_file(sd_journal *j, const char *prefix, const char *filename) {
assert(prefix);
assert(filename);
- if (j->no_new_files ||
- !file_type_wanted(j->flags, filename))
+ if (j->no_new_files)
return 0;
- path = strjoina(prefix, "/", filename);
-
- if (!j->has_runtime_files && path_startswith(path, "/run/log/journal"))
- j->has_runtime_files = true;
- else if (!j->has_persistent_files && path_startswith(path, "/var/log/journal"))
- j->has_persistent_files = true;
+ if (!file_type_wanted(j->flags, filename))
+ return 0;
- return add_any_file(j, path);
+ path = strjoina(prefix, "/", filename);
+ return add_any_file(j, -1, path);
}
static void remove_file(sd_journal *j, const char *prefix, const char *filename) {
@@ -1373,21 +1414,33 @@ static int add_directory(sd_journal *j, const char *prefix, const char *dirname)
assert(j);
assert(prefix);
- assert(dirname);
- log_debug("Considering %s/%s.", prefix, dirname);
+ /* Adds a journal file directory to watch. If the directory is already tracked this updates the inotify watch
+ * and reenumerates directory contents */
- if ((j->flags & SD_JOURNAL_LOCAL_ONLY) &&
- !(dirname_is_machine_id(dirname) > 0 || path_startswith(prefix, "/run")))
- return 0;
-
- path = strjoin(prefix, "/", dirname, NULL);
+ if (dirname)
+ path = strjoin(prefix, "/", dirname, NULL);
+ else
+ path = strdup(prefix);
if (!path) {
r = -ENOMEM;
goto fail;
}
- d = opendir(path);
+ log_debug("Considering directory %s.", path);
+
+ /* We consider everything local that is in a directory for the local machine ID, or that is stored in /run */
+ if ((j->flags & SD_JOURNAL_LOCAL_ONLY) &&
+ !((dirname && dirname_is_machine_id(dirname) > 0) || path_has_prefix(j, path, "/run")))
+ return 0;
+
+
+ if (j->toplevel_fd < 0)
+ d = opendir(path);
+ else
+ /* Open the specified directory relative to the the toplevel fd. Enforce that the path specified is
+ * relative, by dropping the initial slash */
+ d = xopendirat(j->toplevel_fd, skip_slash(path), 0);
if (!d) {
r = log_debug_errno(errno, "Failed to open directory %s: %m", path);
goto fail;
@@ -1419,6 +1472,7 @@ static int add_directory(sd_journal *j, const char *prefix, const char *dirname)
return 0;
if (m->wd <= 0 && j->inotify_fd >= 0) {
+ /* Watch this directory, if it not being watched yet. */
m->wd = inotify_add_watch_fd(j->inotify_fd, dirfd(d),
IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE|
@@ -1441,7 +1495,7 @@ static int add_directory(sd_journal *j, const char *prefix, const char *dirname)
return 0;
fail:
- k = journal_put_error(j, r, path ?: dirname);
+ k = journal_put_error(j, r, path ?: prefix);
if (k < 0)
return k;
@@ -1449,28 +1503,62 @@ fail:
}
static int add_root_directory(sd_journal *j, const char *p, bool missing_ok) {
+
_cleanup_closedir_ DIR *d = NULL;
struct dirent *de;
Directory *m;
int r, k;
assert(j);
- assert(p);
- if ((j->flags & SD_JOURNAL_RUNTIME_ONLY) &&
- !path_startswith(p, "/run"))
- return -EINVAL;
+ /* Adds a root directory to our set of directories to use. If the root directory is already in the set, we
+ * update the inotify logic, and renumerate the directory entries. This call may hence be called to initially
+ * populate the set, as well as to update it later. */
- if (j->prefix)
- p = strjoina(j->prefix, p);
+ if (p) {
+ /* If there's a path specified, use it. */
- d = opendir(p);
- if (!d) {
- if (errno == ENOENT && missing_ok)
- return 0;
+ if ((j->flags & SD_JOURNAL_RUNTIME_ONLY) &&
+ !path_has_prefix(j, p, "/run"))
+ return -EINVAL;
- r = log_debug_errno(errno, "Failed to open root directory %s: %m", p);
- goto fail;
+ if (j->prefix)
+ p = strjoina(j->prefix, p);
+
+ if (j->toplevel_fd < 0)
+ d = opendir(p);
+ else
+ d = xopendirat(j->toplevel_fd, skip_slash(p), 0);
+
+ if (!d) {
+ if (errno == ENOENT && missing_ok)
+ return 0;
+
+ r = log_debug_errno(errno, "Failed to open root directory %s: %m", p);
+ goto fail;
+ }
+ } else {
+ int dfd;
+
+ /* If there's no path specified, then we use the top-level fd itself. We duplicate the fd here, since
+ * opendir() will take possession of the fd, and close it, which we don't want. */
+
+ p = "."; /* store this as "." in the directories hashmap */
+
+ dfd = fcntl(j->toplevel_fd, F_DUPFD_CLOEXEC, 3);
+ if (dfd < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ d = fdopendir(dfd);
+ if (!d) {
+ r = -errno;
+ safe_close(dfd);
+ goto fail;
+ }
+
+ rewinddir(d);
}
m = hashmap_get(j->directories_by_path, p);
@@ -1482,6 +1570,7 @@ static int add_root_directory(sd_journal *j, const char *p, bool missing_ok) {
}
m->is_root = true;
+
m->path = strdup(p);
if (!m->path) {
free(m);
@@ -1585,8 +1674,7 @@ static int add_current_paths(sd_journal *j) {
assert(j);
assert(j->no_new_files);
- /* Simply adds all directories for files we have open as
- * "root" directories. We don't expect errors here, so we
+ /* Simply adds all directories for files we have open as directories. We don't expect errors here, so we
* treat them as fatal. */
ORDERED_HASHMAP_FOREACH(f, j->files, i) {
@@ -1597,7 +1685,7 @@ static int add_current_paths(sd_journal *j) {
if (!dir)
return -ENOMEM;
- r = add_root_directory(j, dir, true);
+ r = add_directory(j, dir, NULL);
if (r < 0)
return r;
}
@@ -1625,6 +1713,7 @@ static sd_journal *journal_new(int flags, const char *path) {
return NULL;
j->original_pid = getpid();
+ j->toplevel_fd = -1;
j->inotify_fd = -1;
j->flags = flags;
j->data_threshold = DEFAULT_DATA_THRESHOLD;
@@ -1735,7 +1824,6 @@ _public_ int sd_journal_open_directory(sd_journal **ret, const char *path, int f
fail:
sd_journal_close(j);
-
return r;
}
@@ -1752,7 +1840,7 @@ _public_ int sd_journal_open_files(sd_journal **ret, const char **paths, int fla
return -ENOMEM;
STRV_FOREACH(path, paths) {
- r = add_any_file(j, *path);
+ r = add_any_file(j, -1, *path);
if (r < 0)
goto fail;
}
@@ -1764,7 +1852,93 @@ _public_ int sd_journal_open_files(sd_journal **ret, const char **paths, int fla
fail:
sd_journal_close(j);
+ return r;
+}
+
+_public_ int sd_journal_open_directory_fd(sd_journal **ret, int fd, int flags) {
+ sd_journal *j;
+ struct stat st;
+ int r;
+
+ assert_return(ret, -EINVAL);
+ assert_return(fd >= 0, -EBADF);
+ assert_return(flags == 0, -EINVAL);
+
+ if (fstat(fd, &st) < 0)
+ return -errno;
+
+ if (!S_ISDIR(st.st_mode))
+ return -EBADFD;
+
+ j = journal_new(flags, NULL);
+ if (!j)
+ return -ENOMEM;
+ j->toplevel_fd = fd;
+
+ r = add_root_directory(j, NULL, false);
+ if (r < 0)
+ goto fail;
+
+ *ret = j;
+ return 0;
+
+fail:
+ sd_journal_close(j);
+ return r;
+}
+
+_public_ int sd_journal_open_files_fd(sd_journal **ret, int fds[], unsigned n_fds, int flags) {
+ Iterator iterator;
+ JournalFile *f;
+ sd_journal *j;
+ unsigned i;
+ int r;
+
+ assert_return(ret, -EINVAL);
+ assert_return(n_fds > 0, -EBADF);
+ assert_return(flags == 0, -EINVAL);
+
+ j = journal_new(flags, NULL);
+ if (!j)
+ return -ENOMEM;
+
+ for (i = 0; i < n_fds; i++) {
+ struct stat st;
+
+ if (fds[i] < 0) {
+ r = -EBADF;
+ goto fail;
+ }
+
+ if (fstat(fds[i], &st) < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ if (!S_ISREG(st.st_mode)) {
+ r = -EBADFD;
+ goto fail;
+ }
+
+ r = add_any_file(j, fds[i], NULL);
+ if (r < 0)
+ goto fail;
+ }
+
+ j->no_new_files = true;
+ j->no_inotify = true;
+
+ *ret = j;
+ return 0;
+
+fail:
+ /* If we fail, make sure we don't take possession of the files we managed to make use of successfuly, and they
+ * remain open */
+ ORDERED_HASHMAP_FOREACH(f, j->files, iterator)
+ f->close_fd = false;
+
+ sd_journal_close(j);
return r;
}
@@ -2091,6 +2265,9 @@ _public_ int sd_journal_get_fd(sd_journal *j) {
assert_return(j, -EINVAL);
assert_return(!journal_pid_changed(j), -ECHILD);
+ if (j->no_inotify)
+ return -EMEDIUMTYPE;
+
if (j->inotify_fd >= 0)
return j->inotify_fd;
@@ -2098,10 +2275,14 @@ _public_ int sd_journal_get_fd(sd_journal *j) {
if (r < 0)
return r;
+ log_debug("Reiterating files to get inotify watches established");
+
/* Iterate through all dirs again, to add them to the
* inotify */
if (j->no_new_files)
r = add_current_paths(j);
+ else if (j->toplevel_fd >= 0)
+ r = add_root_directory(j, NULL, false);
else if (j->path)
r = add_root_directory(j, j->path, true);
else
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-16 12:58:37 +0000