Grow_reshape should be split into helper functions given its size.
- Add helper function for preparing reshape on external metadata.
- Close cfd file descriptor.
Signed-off-by: Mateusz Kusiak <mateusz.kusiak@xxxxxxxxx>
---
Changes since v2:
- removed dot from commit message
- formatted commit description as a list
- got rid of returning -1 in prepare_external_reshape()
- changed "return" section in prepare_external_reshape() description
---
Grow.c | 124 ++++++++++++++++++++++++++++++--------------------------
mdadm.h | 1 +
util.c | 14 +++++++
3 files changed, 81 insertions(+), 58 deletions(-)
diff --git a/Grow.c b/Grow.c
index 9c6fc95e..c247e11b 100644
--- a/Grow.c
+++ b/Grow.c
@@ -1774,6 +1774,65 @@ static int reshape_container(char *container, char *devname,
char *backup_file, int verbose,
int forked, int restart, int freeze_reshape);
+/**
+ * prepare_external_reshape() - prepares update on external metadata if supported.
+ * @devname: Device name.
+ * @subarray: Subarray.
+ * @st: Supertype.
+ * @container: Container.
+ * @cfd: Container file descriptor.
+ *
+ * Function checks that the requested reshape is supported on external metadata,
+ * and performs an initial check that the container holds the pre-requisite
+ * spare devices (mdmon owns final validation).
+ *
+ * Return: 0 on success, else 1
+ */
+static int prepare_external_reshape(char *devname, char *subarray,
+ struct supertype *st, char *container,
+ const int cfd)
+{
+ struct mdinfo *cc = NULL;
+ struct mdinfo *content = NULL;
+
+ if (st->ss->load_container(st, cfd, NULL)) {
+ pr_err("Cannot read superblock for %s\n", devname);
+ return 1;
+ }
+
+ if (!st->ss->container_content)
+ return 1;
+
+ cc = st->ss->container_content(st, subarray);
+ for (content = cc; content ; content = content->next) {
+ /*
+ * check if reshape is allowed based on metadata
+ * indications stored in content.array.status
+ */
+ if (is_bit_set(&content->array.state, MD_SB_BLOCK_VOLUME) ||
+ is_bit_set(&content->array.state, MD_SB_BLOCK_CONTAINER_RESHAPE)) {
+ pr_err("Cannot reshape arrays in container with unsupported metadata: %s(%s)\n",
+ devname, container);
+ goto error;
+ }
+ if (content->consistency_policy == CONSISTENCY_POLICY_PPL) {
+ pr_err("Operation not supported when ppl consistency policy is enabled\n");
+ goto error;
+ }
+ if (content->consistency_policy == CONSISTENCY_POLICY_BITMAP) {
+ pr_err("Operation not supported when write-intent bitmap consistency policy is enabled\n");
+ goto error;
+ }
+ }
+ sysfs_free(cc);
+ if (mdmon_running(container))
+ st->update_tail = &st->updates;
+ return 0;
+error:
+ sysfs_free(cc);
+ return 1;
+}
+
int Grow_reshape(char *devname, int fd,
struct mddev_dev *devlist,
unsigned long long data_offset,
@@ -1801,7 +1860,7 @@ int Grow_reshape(char *devname, int fd,
struct supertype *st;
char *subarray = NULL;
- int frozen;
+ int frozen = 0;
int changed = 0;
char *container = NULL;
int cfd = -1;
@@ -1810,7 +1869,7 @@ int Grow_reshape(char *devname, int fd,
int added_disks;
struct mdinfo info;
- struct mdinfo *sra;
+ struct mdinfo *sra = NULL;
if (md_get_array_info(fd, &array) < 0) {
pr_err("%s is not an active md array - aborting\n",
@@ -1867,13 +1926,7 @@ int Grow_reshape(char *devname, int fd,
}
}
- /* in the external case we need to check that the requested reshape is
- * supported, and perform an initial check that the container holds the
- * pre-requisite spare devices (mdmon owns final validation)
- */
if (st->ss->external) {
- int retval;
-
if (subarray) {
container = st->container_devnm;
cfd = open_dev_excl(st->container_devnm);
@@ -1889,58 +1942,13 @@ int Grow_reshape(char *devname, int fd,
return 1;
}
- retval = st->ss->load_container(st, cfd, NULL);
-
- if (retval) {
- pr_err("Cannot read superblock for %s\n", devname);
+ rv = prepare_external_reshape(devname, subarray, st,
+ container, cfd);
+ if (rv > 0) {
free(subarray);
- return 1;
- }
-
- /* check if operation is supported for metadata handler */
- if (st->ss->container_content) {
- struct mdinfo *cc = NULL;
- struct mdinfo *content = NULL;
-
- cc = st->ss->container_content(st, subarray);
- for (content = cc; content ; content = content->next) {
- int allow_reshape = 1;
-
- /* check if reshape is allowed based on metadata
- * indications stored in content.array.status
- */
- if (content->array.state &
- (1 << MD_SB_BLOCK_VOLUME))
- allow_reshape = 0;
- if (content->array.state &
- (1 << MD_SB_BLOCK_CONTAINER_RESHAPE))
- allow_reshape = 0;
- if (!allow_reshape) {
- pr_err("cannot reshape arrays in container with unsupported metadata: %s(%s)\n",
- devname, container);
- sysfs_free(cc);
- free(subarray);
- return 1;
- }
- if (content->consistency_policy ==
- CONSISTENCY_POLICY_PPL) {
- pr_err("Operation not supported when ppl consistency policy is enabled\n");
- sysfs_free(cc);
- free(subarray);
- return 1;
- }
- if (content->consistency_policy ==
- CONSISTENCY_POLICY_BITMAP) {
- pr_err("Operation not supported when write-intent bitmap is enabled\n");
- sysfs_free(cc);
- free(subarray);
- return 1;
- }
- }
- sysfs_free(cc);
+ close(cfd);
+ goto release;
}
- if (mdmon_running(container))
- st->update_tail = &st->updates;
}
added_disks = 0;
diff --git a/mdadm.h b/mdadm.h
index c7268a71..7bf9147d 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -1528,6 +1528,7 @@ extern int stat_is_blkdev(char *devname, dev_t *rdev);
extern bool is_dev_alive(char *path);
extern int get_mdp_major(void);
extern int get_maj_min(char *dev, int *major, int *minor);
+extern bool is_bit_set(int *val, unsigned char index);
extern int dev_open(char *dev, int flags);
extern int open_dev(char *devnm);
extern void reopen_mddev(int mdfd);
diff --git a/util.c b/util.c
index 3d05d074..c13c81d7 100644
--- a/util.c
+++ b/util.c
@@ -1028,6 +1028,20 @@ int get_maj_min(char *dev, int *major, int *minor)
*e == 0);
}
+/**
+ * is_bit_set() - get bit value by index.
+ * @val: value.
+ * @index: index of the bit (LSB numbering).
+ *
+ * Return: bit value.
+ */
+bool is_bit_set(int *val, unsigned char index)
+{
+ if ((*val) & (1 << index))
+ return true;
+ return false;
+}
+
int dev_open(char *dev, int flags)
{
/* like 'open', but if 'dev' matches %d:%d, create a temp
--
2.26.2
