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authorLennart Poettering <lennart@poettering.net>2014-05-16 17:07:51 +0200
committerLennart Poettering <lennart@poettering.net>2014-05-16 17:07:51 +0200
commita8c73b860c04a6feb1d3edb15b283f3bb3dde799 (patch)
treeba615ff1c990f99712bef6f7333aa80d0dab2fde /src/readahead/readahead-replay.c
parent851fafe587087a52a556aea020546e1d229ff3b0 (diff)
readahead: modernizations
Diffstat (limited to 'src/readahead/readahead-replay.c')
-rw-r--r--src/readahead/readahead-replay.c104
1 files changed, 40 insertions, 64 deletions
diff --git a/src/readahead/readahead-replay.c b/src/readahead/readahead-replay.c
index 8dc194257f..f46dc3baeb 100644
--- a/src/readahead/readahead-replay.c
+++ b/src/readahead/readahead-replay.c
@@ -47,8 +47,8 @@
static ReadaheadShared *shared = NULL;
static int unpack_file(FILE *pack) {
+ _cleanup_close_ int fd = -1;
char fn[PATH_MAX];
- int r = 0, fd = -1;
bool any = false;
struct stat st;
uint64_t inode;
@@ -63,7 +63,6 @@ static int unpack_file(FILE *pack) {
fd = open(fn, O_RDONLY|O_CLOEXEC|O_NOATIME|O_NOCTTY|O_NOFOLLOW);
if (fd < 0) {
-
if (errno != ENOENT && errno != EPERM && errno != EACCES && errno != ELOOP)
log_warning("open(%s) failed: %m", fn);
@@ -72,8 +71,7 @@ static int unpack_file(FILE *pack) {
if (fread(&inode, sizeof(inode), 1, pack) != 1) {
log_error("Premature end of pack file.");
- r = -EIO;
- goto finish;
+ return -EIO;
}
if (fd >= 0) {
@@ -89,8 +87,7 @@ static int unpack_file(FILE *pack) {
if (fread(&b, sizeof(b), 1, pack) != 1 ||
fread(&c, sizeof(c), 1, pack) != 1) {
log_error("Premature end of pack file.");
- r = -EIO;
- goto finish;
+ return -EIO;
}
if (b == 0 && c == 0)
@@ -98,19 +95,19 @@ static int unpack_file(FILE *pack) {
if (c <= b) {
log_error("Invalid pack file.");
- r = -EIO;
- goto finish;
+ return -EIO;
}
log_debug("%s: page %u to %u", fn, b, c);
any = true;
- if (fd >= 0)
+ if (fd >= 0) {
if (posix_fadvise(fd, b * page_size(), (c - b) * page_size(), POSIX_FADV_WILLNEED) < 0) {
log_warning("posix_fadvise() failed: %m");
- goto finish;
+ return -errno;
}
+ }
}
if (!any && fd >= 0) {
@@ -120,71 +117,61 @@ static int unpack_file(FILE *pack) {
if (posix_fadvise(fd, 0, st.st_size, POSIX_FADV_WILLNEED) < 0) {
log_warning("posix_fadvise() failed: %m");
- goto finish;
+ return -errno;
}
}
-finish:
- safe_close(fd);
-
- return r;
+ return 0;
}
static int replay(const char *root) {
- FILE *pack = NULL;
- char line[LINE_MAX];
- int r = 0;
- char *pack_fn = NULL;
- int c;
+ _cleanup_close_ int inotify_fd = -1;
+ _cleanup_free_ char *pack_fn = NULL;
+ _cleanup_fclose_ FILE *pack = NULL;
bool on_ssd, ready = false;
- int prio;
- int inotify_fd = -1;
+ char line[LINE_MAX];
+ int prio, c;
assert(root);
block_bump_request_nr(root);
- if (asprintf(&pack_fn, "%s/.readahead", root) < 0) {
- r = log_oom();
- goto finish;
- }
+ if (asprintf(&pack_fn, "%s/.readahead", root) < 0)
+ return log_oom();
pack = fopen(pack_fn, "re");
if (!pack) {
- if (errno == ENOENT)
+ if (errno == ENOENT) {
log_debug("No pack file found.");
- else {
- log_error("Failed to open pack file: %m");
- r = -errno;
+ return 0;
}
- goto finish;
+ log_error("Failed to open pack file: %m");
+ return -errno;
}
posix_fadvise(fileno(pack), 0, 0, POSIX_FADV_WILLNEED);
- if ((inotify_fd = open_inotify()) < 0) {
- r = inotify_fd;
- goto finish;
- }
+ inotify_fd = open_inotify();
+ if (inotify_fd < 0)
+ return inotify_fd;
- if (!(fgets(line, sizeof(line), pack))) {
+ if (!fgets(line, sizeof(line), pack)) {
log_error("Premature end of pack file.");
- r = -EIO;
- goto finish;
+ return -EIO;
}
char_array_0(line);
if (!streq(line, CANONICAL_HOST READAHEAD_PACK_FILE_VERSION)) {
log_debug("Pack file host or version type mismatch.");
- goto finish;
+ goto done;
}
- if ((c = getc(pack)) == EOF) {
+ c = getc(pack);
+ if (c == EOF) {
log_debug("Premature end of pack file.");
- r = -EIO;
- goto finish;
+ return -EIO;
}
/* We do not retest SSD here, so that we can start replaying
@@ -220,11 +207,11 @@ static int replay(const char *root) {
int k;
ssize_t n;
- if ((n = read(inotify_fd, &inotify_buffer, sizeof(inotify_buffer))) < 0) {
+ n = read(inotify_fd, &inotify_buffer, sizeof(inotify_buffer));
+ if (n < 0) {
if (errno != EINTR && errno != EAGAIN) {
log_error("Failed to read inotify event: %m");
- r = -errno;
- goto finish;
+ return -errno;
}
} else {
struct inotify_event *e = (struct inotify_event*) inotify_buffer;
@@ -245,10 +232,9 @@ static int replay(const char *root) {
}
}
- if ((k = unpack_file(pack)) < 0) {
- r = k;
- goto finish;
- }
+ k = unpack_file(pack);
+ if (k < 0)
+ return k;
if (!ready) {
/* We delay the ready notification until we
@@ -259,26 +245,16 @@ static int replay(const char *root) {
}
done:
- if (!ready)
- sd_notify(0, "READY=1");
-
if (ferror(pack)) {
log_error("Failed to read pack file.");
- r = -EIO;
- goto finish;
+ return -EIO;
}
- log_debug("Done.");
-
-finish:
- if (pack)
- fclose(pack);
-
- safe_close(inotify_fd);
-
- free(pack_fn);
+ if (!ready)
+ sd_notify(0, "READY=1");
- return r;
+ log_debug("Done.");
+ return 0;
}
int main_replay(const char *root) {