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mdadm/SOURCES/0121-mdadm-define-DEV_MD_DIR.patch

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From b9ce7ab0218c550488587fdad5708628d6a5ffc2 Mon Sep 17 00:00:00 2001
From: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
Date: Thu, 23 Mar 2023 17:50:14 +0100
Subject: [PATCH 121/125] mdadm: define DEV_MD_DIR
It is used many times. Additionally define _LEN to avoid repeated
strlen() calls when length is needed.
Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
Signed-off-by: Jes Sorensen <jes@trained-monkey.org>
---
Create.c | 7 +++----
Detail.c | 9 ++++-----
Incremental.c | 4 ++--
Monitor.c | 32 ++++++++++++++++++--------------
config.c | 10 +++++-----
lib.c | 2 +-
mapfile.c | 12 ++++++------
mdadm.h | 8 ++++++++
mdopen.c | 6 +++---
super-ddf.c | 2 +-
super-intel.c | 2 +-
super1.c | 3 +--
sysfs.c | 2 +-
13 files changed, 54 insertions(+), 45 deletions(-)
diff --git a/Create.c b/Create.c
index aa0472dd..ea6a4745 100644
--- a/Create.c
+++ b/Create.c
@@ -1024,10 +1024,9 @@ int Create(struct supertype *st, char *mddev,
* it could be in conflict with already existing device
* e.g. container, array
*/
- if (strncmp(chosen_name, "/dev/md/", 8) == 0 &&
- map_by_name(&map, chosen_name+8) != NULL) {
- pr_err("Array name %s is in use already.\n",
- chosen_name);
+ if (strncmp(chosen_name, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0 &&
+ map_by_name(&map, chosen_name + DEV_MD_DIR_LEN)) {
+ pr_err("Array name %s is in use already.\n", chosen_name);
close(mdfd);
map_unlock(&map);
udev_unblock();
diff --git a/Detail.c b/Detail.c
index 4ef26460..206d88e3 100644
--- a/Detail.c
+++ b/Detail.c
@@ -254,10 +254,9 @@ int Detail(char *dev, struct context *c)
fname_from_uuid(st, info, nbuf, ':');
printf("MD_UUID=%s\n", nbuf + 5);
mp = map_by_uuid(&map, info->uuid);
- if (mp && mp->path &&
- strncmp(mp->path, "/dev/md/", 8) == 0) {
+ if (mp && mp->path && strncmp(mp->path, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0) {
printf("MD_DEVNAME=");
- print_escape(mp->path + 8);
+ print_escape(mp->path + DEV_MD_DIR_LEN);
putchar('\n');
}
@@ -273,9 +272,9 @@ int Detail(char *dev, struct context *c)
printf("MD_UUID=%s\n", nbuf+5);
}
if (mp && mp->path &&
- strncmp(mp->path, "/dev/md/", 8) == 0) {
+ strncmp(mp->path, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0) {
printf("MD_DEVNAME=");
- print_escape(mp->path+8);
+ print_escape(mp->path + DEV_MD_DIR_LEN);
putchar('\n');
}
map_free(map);
diff --git a/Incremental.c b/Incremental.c
index 49a71f72..59b850f1 100644
--- a/Incremental.c
+++ b/Incremental.c
@@ -460,8 +460,8 @@ int Incremental(struct mddev_dev *devlist, struct context *c,
info.array.working_disks ++;
}
- if (strncmp(chosen_name, "/dev/md/", 8) == 0)
- md_devname = chosen_name+8;
+ if (strncmp(chosen_name, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0)
+ md_devname = chosen_name + DEV_MD_DIR_LEN;
else
md_devname = chosen_name;
if (c->export) {
diff --git a/Monitor.c b/Monitor.c
index 44918184..3273f2fb 100644
--- a/Monitor.c
+++ b/Monitor.c
@@ -36,9 +36,18 @@
#define EVENT_NAME_MAX 32
#define AUTOREBUILD_PID_PATH MDMON_DIR "/autorebuild.pid"
+/**
+ * struct state - external array or container properties.
+ * @devname: has length of %DEV_MD_DIR + device name + terminating byte
+ * @devnm: to sync with mdstat info
+ * @parent_devnm: or subarray, devnm of parent, for others, ""
+ * @subarray: for a container it is a link to first subarray, for a subarray it is a link to next
+ * subarray in the same container
+ * @parent: for a subarray it is a link to its container
+ */
struct state {
- char devname[MD_NAME_MAX + sizeof("/dev/md/")]; /* length of "/dev/md/" + device name + terminating byte*/
- char devnm[MD_NAME_MAX]; /* to sync with mdstat info */
+ char devname[MD_NAME_MAX + sizeof(DEV_MD_DIR)];
+ char devnm[MD_NAME_MAX];
unsigned int utime;
int err;
char *spare_group;
@@ -49,15 +58,10 @@ struct state {
int devstate[MAX_DISKS];
dev_t devid[MAX_DISKS];
int percent;
- char parent_devnm[MD_NAME_MAX]; /* For subarray, devnm of parent.
- * For others, ""
- */
+ char parent_devnm[MD_NAME_MAX];
struct supertype *metadata;
- struct state *subarray;/* for a container it is a link to first subarray
- * for a subarray it is a link to next subarray
- * in the same container */
- struct state *parent; /* for a subarray it is a link to its container
- */
+ struct state *subarray;
+ struct state *parent;
struct state *next;
};
@@ -252,8 +256,8 @@ int Monitor(struct mddev_dev *devlist,
continue;
st = xcalloc(1, sizeof *st);
- snprintf(st->devname, MD_NAME_MAX + sizeof("/dev/md/"),
- "/dev/md/%s", basename(mdlist->devname));
+ snprintf(st->devname, MD_NAME_MAX + sizeof(DEV_MD_DIR), DEV_MD_DIR "%s",
+ basename(mdlist->devname));
st->next = statelist;
st->devnm[0] = 0;
st->percent = RESYNC_UNKNOWN;
@@ -274,7 +278,7 @@ int Monitor(struct mddev_dev *devlist,
st = xcalloc(1, sizeof *st);
mdlist = conf_get_ident(dv->devname);
- snprintf(st->devname, MD_NAME_MAX + sizeof("/dev/md/"), "%s", dv->devname);
+ snprintf(st->devname, MD_NAME_MAX + sizeof(DEV_MD_DIR), "%s", dv->devname);
st->next = statelist;
st->devnm[0] = 0;
st->percent = RESYNC_UNKNOWN;
@@ -942,7 +946,7 @@ static int add_new_arrays(struct mdstat_ent *mdstat, struct state **statelist)
continue;
}
- snprintf(st->devname, MD_NAME_MAX + sizeof("/dev/md/"), "%s", name);
+ snprintf(st->devname, MD_NAME_MAX + sizeof(DEV_MD_DIR), "%s", name);
if ((fd = open(st->devname, O_RDONLY)) < 0 ||
md_get_array_info(fd, &array) < 0) {
/* no such array */
diff --git a/config.c b/config.c
index eeedd0c6..59d5bfb6 100644
--- a/config.c
+++ b/config.c
@@ -405,7 +405,7 @@ void arrayline(char *line)
* or anything that doesn't start '/' or '<'
*/
if (strcasecmp(w, "<ignore>") == 0 ||
- strncmp(w, "/dev/md/", 8) == 0 ||
+ strncmp(w, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0 ||
(w[0] != '/' && w[0] != '<') ||
(strncmp(w, "/dev/md", 7) == 0 &&
is_number(w + 7)) ||
@@ -1102,13 +1102,13 @@ int devname_matches(char *name, char *match)
* mdNN with NN
* then just strcmp
*/
- if (strncmp(name, "/dev/md/", 8) == 0)
- name += 8;
+ if (strncmp(name, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0)
+ name += DEV_MD_DIR_LEN;
else if (strncmp(name, "/dev/", 5) == 0)
name += 5;
- if (strncmp(match, "/dev/md/", 8) == 0)
- match += 8;
+ if (strncmp(match, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0)
+ match += DEV_MD_DIR_LEN;
else if (strncmp(match, "/dev/", 5) == 0)
match += 5;
diff --git a/lib.c b/lib.c
index e395b28d..65ea51e0 100644
--- a/lib.c
+++ b/lib.c
@@ -313,7 +313,7 @@ char *map_dev_preferred(int major, int minor, int create,
for (p = devlist; p; p = p->next)
if (p->major == major && p->minor == minor) {
- if (strncmp(p->name, "/dev/md/",8) == 0 ||
+ if (strncmp(p->name, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0 ||
(prefer && strstr(p->name, prefer))) {
if (preferred == NULL ||
strlen(p->name) < strlen(preferred))
diff --git a/mapfile.c b/mapfile.c
index ac351768..34fea179 100644
--- a/mapfile.c
+++ b/mapfile.c
@@ -320,9 +320,9 @@ struct map_ent *map_by_name(struct map_ent **map, char *name)
for (mp = *map ; mp ; mp = mp->next) {
if (!mp->path)
continue;
- if (strncmp(mp->path, "/dev/md/", 8) != 0)
+ if (strncmp(mp->path, DEV_MD_DIR, DEV_MD_DIR_LEN) != 0)
continue;
- if (strcmp(mp->path+8, name) != 0)
+ if (strcmp(mp->path + DEV_MD_DIR_LEN, name) != 0)
continue;
if (!mddev_busy(mp->devnm)) {
mp->bad = 1;
@@ -413,7 +413,7 @@ void RebuildMap(void)
devid = devnm2devid(md->devnm);
path = map_dev(major(devid), minor(devid), 0);
if (path == NULL ||
- strncmp(path, "/dev/md/", 8) != 0) {
+ strncmp(path, DEV_MD_DIR, DEV_MD_DIR_LEN) != 0) {
/* We would really like a name that provides
* an MD_DEVNAME for udev.
* The name needs to be unique both in /dev/md/
@@ -434,7 +434,7 @@ void RebuildMap(void)
if (match && match->devname && match->devname[0] == '/') {
path = match->devname;
if (path[0] != '/') {
- strcpy(namebuf, "/dev/md/");
+ strcpy(namebuf, DEV_MD_DIR);
strcat(namebuf, path);
path = namebuf;
}
@@ -478,10 +478,10 @@ void RebuildMap(void)
while (conflict) {
if (unum >= 0)
- sprintf(namebuf, "/dev/md/%s%s%d",
+ sprintf(namebuf, DEV_MD_DIR "%s%s%d",
name, sep, unum);
else
- sprintf(namebuf, "/dev/md/%s",
+ sprintf(namebuf, DEV_MD_DIR "%s",
name);
unum++;
if (lstat(namebuf, &stb) != 0 &&
diff --git a/mdadm.h b/mdadm.h
index 0d995445..67d73f96 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -100,6 +100,14 @@ struct dlm_lksb {
#define DEFAULT_BITMAP_DELAY 5
#define DEFAULT_MAX_WRITE_BEHIND 256
+/* DEV_MD_DIR points to named MD devices directory.
+ * DEV_MD_DIR_LEN is a length with Null byte excluded.
+ */
+#ifndef DEV_MD_DIR
+#define DEV_MD_DIR "/dev/md/"
+#define DEV_MD_DIR_LEN (sizeof(DEV_MD_DIR) - 1)
+#endif /* DEV_MD_DIR */
+
/* MAP_DIR should be somewhere that persists across the pivotroot
* from early boot to late boot.
* /run seems to have emerged as the best standard.
diff --git a/mdopen.c b/mdopen.c
index 810f79a3..6c3bdb6a 100644
--- a/mdopen.c
+++ b/mdopen.c
@@ -188,12 +188,12 @@ int create_mddev(char *dev, char *name, int autof, int trustworthy,
parts = autof >> 3;
autof &= 7;
- strcpy(chosen, "/dev/md/");
+ strcpy(chosen, DEV_MD_DIR);
cname = chosen + strlen(chosen);
if (dev) {
- if (strncmp(dev, "/dev/md/", 8) == 0) {
- strcpy(cname, dev+8);
+ if (strncmp(dev, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0) {
+ strcpy(cname, dev + DEV_MD_DIR_LEN);
} else if (strncmp(dev, "/dev/", 5) == 0) {
char *e = dev + strlen(dev);
while (e > dev && isdigit(e[-1]))
diff --git a/super-ddf.c b/super-ddf.c
index b86c6acd..7213284e 100644
--- a/super-ddf.c
+++ b/super-ddf.c
@@ -1648,7 +1648,7 @@ static void brief_examine_subarrays_ddf(struct supertype *st, int verbose)
fname_from_uuid(st, &info, nbuf1, ':');
_ddf_array_name(namebuf, ddf, i);
printf("ARRAY%s%s container=%s member=%d UUID=%s\n",
- namebuf[0] == '\0' ? "" : " /dev/md/", namebuf,
+ namebuf[0] == '\0' ? "" : " " DEV_MD_DIR, namebuf,
nbuf+5, i, nbuf1+5);
}
}
diff --git a/super-intel.c b/super-intel.c
index a5c86cb2..aaf6659e 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -2309,7 +2309,7 @@ static void brief_examine_subarrays_imsm(struct supertype *st, int verbose)
super->current_vol = i;
getinfo_super_imsm(st, &info, NULL);
fname_from_uuid(st, &info, nbuf1, ':');
- printf("ARRAY /dev/md/%.16s container=%s member=%d UUID=%s\n",
+ printf("ARRAY " DEV_MD_DIR "%.16s container=%s member=%d UUID=%s\n",
dev->volume, nbuf + 5, i, nbuf1 + 5);
}
}
diff --git a/super1.c b/super1.c
index 938c3a68..856b0208 100644
--- a/super1.c
+++ b/super1.c
@@ -645,8 +645,7 @@ static void brief_examine_super1(struct supertype *st, int verbose)
printf("ARRAY ");
if (nm) {
- printf("/dev/md/");
- print_escape(nm);
+ printf(DEV_MD_DIR "%s", nm);
putchar(' ');
}
if (verbose && c)
diff --git a/sysfs.c b/sysfs.c
index ca1d888f..94d02f53 100644
--- a/sysfs.c
+++ b/sysfs.c
@@ -1114,7 +1114,7 @@ void sysfsline(char *line)
if (strncasecmp(w, "name=", 5) == 0) {
char *devname = w + 5;
- if (strncmp(devname, "/dev/md/", 8) == 0) {
+ if (strncmp(devname, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0) {
if (sr->devname)
pr_err("Only give one device per SYSFS line: %s\n",
devname);
--
2.38.1
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