Isolation of udev code from remaining systemd

This commit is a first attempt to isolate the udev code from the
remaining code base.  It intentionally does not modify any files
but purely delete files which, on a first examination, appear to
not be needed.  This is a sweeping commit which may easily have
missed needed code.  Files can be retrieved by doing a checkout
from the previous commit:

 git checkout 2944f347d0 -- <filename>

1 files changed, 0 insertions, 359 deletions

diff --git a/src/readahead/readahead-common.c b/src/readahead/readahead-common.c
deleted file mode 100644
index 10b0ccc548..0000000000
--- a/src/readahead/readahead-common.c
+++ /dev/null
@@ -1,359 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright 2010 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 <errno.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/sysinfo.h>
-#include <sys/inotify.h>
-#include <fcntl.h>
-#include <sys/mman.h>
-#include <unistd.h>
-#include <libudev.h>
-
-#include "log.h"
-#include "readahead-common.h"
-#include "util.h"
-
-int file_verify(int fd, const char *fn, off_t file_size_max, struct stat *st) {
-        assert(fd >= 0);
-        assert(fn);
-        assert(st);
-
-        if (fstat(fd, st) < 0) {
-                log_warning("fstat(%s) failed: %m", fn);
-                return -errno;
-        }
-
-        if (!S_ISREG(st->st_mode)) {
-                log_debug("Not preloading special file %s", fn);
-                return 0;
-        }
-
-        if (st->st_size <= 0 || st->st_size > file_size_max) {
-                log_debug("Not preloading file %s with size out of bounds %llu", fn, (unsigned long long) st->st_size);
-                return 0;
-        }
-
-        return 1;
-}
-
-int fs_on_ssd(const char *p) {
-        struct stat st;
-        struct udev *udev = NULL;
-        struct udev_device *udev_device = NULL, *look_at = NULL;
-        bool b = false;
-        const char *devtype, *rotational, *model, *id;
-
-        assert(p);
-
-        if (stat(p, &st) < 0)
-                return -errno;
-
-        if (major(st.st_dev) == 0)
-                return false;
-
-        udev = udev_new();
-        if (!udev)
-                return -ENOMEM;
-
-        udev_device = udev_device_new_from_devnum(udev, 'b', st.st_dev);
-        if (!udev_device)
-                goto finish;
-
-        devtype = udev_device_get_property_value(udev_device, "DEVTYPE");
-        if (devtype && streq(devtype, "partition"))
-                look_at = udev_device_get_parent(udev_device);
-        else
-                look_at = udev_device;
-
-        if (!look_at)
-                goto finish;
-
-        /* First, try high-level property */
-        id = udev_device_get_property_value(look_at, "ID_SSD");
-        if (id) {
-                b = streq(id, "1");
-                goto finish;
-        }
-
-        /* Second, try kernel attribute */
-        rotational = udev_device_get_sysattr_value(look_at, "queue/rotational");
-        if (rotational)
-                if ((b = streq(rotational, "0")))
-                        goto finish;
-
-        /* Finally, fallback to heuristics */
-        look_at = udev_device_get_parent(look_at);
-        if (!look_at)
-                goto finish;
-
-        model = udev_device_get_sysattr_value(look_at, "model");
-        if (model)
-                b = !!strstr(model, "SSD");
-
-finish:
-        if (udev_device)
-                udev_device_unref(udev_device);
-
-        if (udev)
-                udev_unref(udev);
-
-        return b;
-}
-
-int fs_on_read_only(const char *p) {
-        struct stat st;
-        struct udev *udev = NULL;
-        struct udev_device *udev_device = NULL;
-        bool b = false;
-        const char *read_only;
-
-        assert(p);
-
-        if (stat(p, &st) < 0)
-                return -errno;
-
-        if (major(st.st_dev) == 0)
-                return false;
-
-        if (!(udev = udev_new()))
-                return -ENOMEM;
-
-        if (!(udev_device = udev_device_new_from_devnum(udev, 'b', st.st_dev)))
-                goto finish;
-
-        if ((read_only = udev_device_get_sysattr_value(udev_device, "ro")))
-                if ((b = streq(read_only, "1")))
-                        goto finish;
-
-finish:
-        if (udev_device)
-                udev_device_unref(udev_device);
-
-        if (udev)
-                udev_unref(udev);
-
-        return b;
-}
-
-bool enough_ram(void) {
-        struct sysinfo si;
-
-        assert_se(sysinfo(&si) >= 0);
-
-        /* Enable readahead only with at least 128MB memory */
-        return si.totalram > 127 * 1024*1024 / si.mem_unit;
-}
-
-int open_inotify(void) {
-        int fd;
-
-        if ((fd = inotify_init1(IN_CLOEXEC|IN_NONBLOCK)) < 0) {
-                log_error("Failed to create inotify handle: %m");
-                return -errno;
-        }
-
-        mkdir("/run/systemd", 0755);
-        mkdir("/run/systemd/readahead", 0755);
-
-        if (inotify_add_watch(fd, "/run/systemd/readahead", IN_CREATE) < 0) {
-                log_error("Failed to watch /run/systemd/readahead: %m");
-                close_nointr_nofail(fd);
-                return -errno;
-        }
-
-        return fd;
-}
-
-ReadaheadShared *shared_get(void) {
-        int fd;
-        ReadaheadShared *m = NULL;
-
-        mkdir("/run/systemd", 0755);
-        mkdir("/run/systemd/readahead", 0755);
-
-        if ((fd = open("/run/systemd/readahead/shared", O_CREAT|O_RDWR|O_CLOEXEC, 0644)) < 0) {
-                log_error("Failed to create shared memory segment: %m");
-                goto finish;
-        }
-
-        if (ftruncate(fd, sizeof(ReadaheadShared)) < 0) {
-                log_error("Failed to truncate shared memory segment: %m");
-                goto finish;
-        }
-
-        if ((m = mmap(NULL, sizeof(ReadaheadShared), PROT_WRITE|PROT_READ, MAP_SHARED, fd, 0)) == MAP_FAILED) {
-                log_error("Failed to mmap shared memory segment: %m");
-                m = NULL;
-                goto finish;
-        }
-
-finish:
-        if (fd >= 0)
-                close_nointr_nofail(fd);
-
-        return m;
-}
-
-/* We use 20K instead of the more human digestable 16K here. Why?
-   Simply so that it is more unlikely that users end up picking this
-   value too so that we can recognize better whether the user changed
-   the value while we had it temporarily bumped. */
-#define BUMP_REQUEST_NR (20*1024)
-
-int block_bump_request_nr(const char *p) {
-        struct stat st;
-        uint64_t u;
-        char *ap = NULL, *line = NULL;
-        int r;
-        dev_t d;
-
-        assert(p);
-
-        if (stat(p, &st) < 0)
-                return -errno;
-
-        if (major(st.st_dev) == 0)
-                return 0;
-
-        d = st.st_dev;
-        block_get_whole_disk(d, &d);
-
-        if (asprintf(&ap, "/sys/dev/block/%u:%u/queue/nr_requests", major(d), minor(d)) < 0) {
-                r= -ENOMEM;
-                goto finish;
-        }
-
-        r = read_one_line_file(ap, &line);
-        if (r < 0) {
-                if (r == -ENOENT)
-                        r = 0;
-                goto finish;
-        }
-
-        r = safe_atou64(line, &u);
-        if (r >= 0 && u >= BUMP_REQUEST_NR) {
-                r = 0;
-                goto finish;
-        }
-
-        free(line);
-        line = NULL;
-
-        if (asprintf(&line, "%lu", (unsigned long) BUMP_REQUEST_NR) < 0) {
-                r = -ENOMEM;
-                goto finish;
-        }
-
-        r = write_one_line_file(ap, line);
-        if (r < 0)
-                goto finish;
-
-        log_info("Bumped block_nr parameter of %u:%u to %lu. This is a temporary hack and should be removed one day.", major(d), minor(d), (unsigned long) BUMP_REQUEST_NR);
-        r = 1;
-
-finish:
-        free(ap);
-        free(line);
-
-        return r;
-}
-
-int block_get_readahead(const char *p, uint64_t *bytes) {
-        struct stat st;
-        char *ap = NULL, *line = NULL;
-        int r;
-        dev_t d;
-        uint64_t u;
-
-        assert(p);
-        assert(bytes);
-
-        if (stat(p, &st) < 0)
-                return -errno;
-
-        if (major(st.st_dev) == 0)
-                return 0;
-
-        d = st.st_dev;
-        block_get_whole_disk(d, &d);
-
-        if (asprintf(&ap, "/sys/dev/block/%u:%u/bdi/read_ahead_kb", major(d), minor(d)) < 0) {
-                r = -ENOMEM;
-                goto finish;
-        }
-
-        r = read_one_line_file(ap, &line);
-        if (r < 0)
-                goto finish;
-
-        r = safe_atou64(line, &u);
-        if (r < 0)
-                goto finish;
-
-        *bytes = u * 1024ULL;
-
-finish:
-        free(ap);
-        free(line);
-
-        return r;
-}
-
-int block_set_readahead(const char *p, uint64_t bytes) {
-        struct stat st;
-        char *ap = NULL, *line = NULL;
-        int r;
-        dev_t d;
-
-        assert(p);
-        assert(bytes);
-
-        if (stat(p, &st) < 0)
-                return -errno;
-
-        if (major(st.st_dev) == 0)
-                return 0;
-
-        d = st.st_dev;
-        block_get_whole_disk(d, &d);
-
-        if (asprintf(&ap, "/sys/dev/block/%u:%u/bdi/read_ahead_kb", major(d), minor(d)) < 0) {
-                r = -ENOMEM;
-                goto finish;
-        }
-
-        if (asprintf(&line, "%llu", (unsigned long long) bytes / 1024ULL) < 0) {
-                r = -ENOMEM;
-                goto finish;
-        }
-
-        r = write_one_line_file(ap, line);
-        if (r < 0)
-                goto finish;
-
-finish:
-        free(ap);
-        free(line);
-
-        return r;
-}