drbd: code cleanups without semantic changes

This contains various cosmetic fixes ranging from simple typos to
const-ifying, and using booleans properly.

Original commit messages from Fabian's patch set:
drbd: debugfs: constify drbd_version_fops
drbd: use seq_put instead of seq_print where possible
drbd: include linux/uaccess.h instead of asm/uaccess.h
drbd: use const char * const for drbd strings
drbd: kerneldoc warning fix in w_e_end_data_req()
drbd: use unsigned for one bit fields
drbd: use bool for peer is_ states
drbd: fix typo
drbd: use | for bitmask combination
drbd: use true/false for bool
drbd: fix drbd_bm_init() comments
drbd: introduce peer state union
drbd: fix maybe_pull_ahead() locking comments
drbd: use bool for growing
drbd: remove redundant declarations
drbd: replace if/BUG by BUG_ON

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Roland Kammerer <roland.kammerer@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Fabian Frederick 2016-06-14 00:26:35 +02:00 committed by Jens Axboe
parent 20004e2435
commit 7e5fec3168
14 changed files with 59 additions and 54 deletions

View File

@ -427,8 +427,7 @@ static struct page **bm_realloc_pages(struct drbd_bitmap *b, unsigned long want)
}
/*
* called on driver init only. TODO call when a device is created.
* allocates the drbd_bitmap, and stores it in device->bitmap.
* allocates the drbd_bitmap and stores it in device->bitmap.
*/
int drbd_bm_init(struct drbd_device *device)
{
@ -633,7 +632,8 @@ int drbd_bm_resize(struct drbd_device *device, sector_t capacity, int set_new_bi
unsigned long bits, words, owords, obits;
unsigned long want, have, onpages; /* number of pages */
struct page **npages, **opages = NULL;
int err = 0, growing;
int err = 0;
bool growing;
if (!expect(b))
return -ENOMEM;

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@ -903,7 +903,7 @@ static int drbd_version_open(struct inode *inode, struct file *file)
return single_open(file, drbd_version_show, NULL);
}
static struct file_operations drbd_version_fops = {
static const struct file_operations drbd_version_fops = {
.owner = THIS_MODULE,
.open = drbd_version_open,
.llseek = seq_lseek,

View File

@ -1499,7 +1499,7 @@ extern enum drbd_state_rv drbd_set_role(struct drbd_device *device,
int force);
extern bool conn_try_outdate_peer(struct drbd_connection *connection);
extern void conn_try_outdate_peer_async(struct drbd_connection *connection);
extern int conn_khelper(struct drbd_connection *connection, char *cmd);
extern enum drbd_peer_state conn_khelper(struct drbd_connection *connection, char *cmd);
extern int drbd_khelper(struct drbd_device *device, char *cmd);
/* drbd_worker.c */
@ -1648,8 +1648,6 @@ void drbd_bump_write_ordering(struct drbd_resource *resource, struct drbd_backin
/* drbd_proc.c */
extern struct proc_dir_entry *drbd_proc;
extern const struct file_operations drbd_proc_fops;
extern const char *drbd_conn_str(enum drbd_conns s);
extern const char *drbd_role_str(enum drbd_role s);
/* drbd_actlog.c */
extern bool drbd_al_begin_io_prepare(struct drbd_device *device, struct drbd_interval *i);

View File

@ -6,13 +6,13 @@
struct drbd_interval {
struct rb_node rb;
sector_t sector; /* start sector of the interval */
unsigned int size; /* size in bytes */
sector_t end; /* highest interval end in subtree */
int local:1 /* local or remote request? */;
int waiting:1; /* someone is waiting for this to complete */
int completed:1; /* this has been completed already;
* ignore for conflict detection */
sector_t sector; /* start sector of the interval */
unsigned int size; /* size in bytes */
sector_t end; /* highest interval end in subtree */
unsigned int local:1 /* local or remote request? */;
unsigned int waiting:1; /* someone is waiting for completion */
unsigned int completed:1; /* this has been completed already;
* ignore for conflict detection */
};
static inline void drbd_clear_interval(struct drbd_interval *i)

View File

@ -31,7 +31,7 @@
#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/drbd.h>
#include <asm/uaccess.h>
#include <linux/uaccess.h>
#include <asm/types.h>
#include <net/sock.h>
#include <linux/ctype.h>

View File

@ -387,7 +387,7 @@ int drbd_khelper(struct drbd_device *device, char *cmd)
return ret;
}
int conn_khelper(struct drbd_connection *connection, char *cmd)
enum drbd_peer_state conn_khelper(struct drbd_connection *connection, char *cmd)
{
char *envp[] = { "HOME=/",
"TERM=linux",
@ -503,17 +503,17 @@ bool conn_try_outdate_peer(struct drbd_connection *connection)
r = conn_khelper(connection, "fence-peer");
switch ((r>>8) & 0xff) {
case 3: /* peer is inconsistent */
case P_INCONSISTENT: /* peer is inconsistent */
ex_to_string = "peer is inconsistent or worse";
mask.pdsk = D_MASK;
val.pdsk = D_INCONSISTENT;
break;
case 4: /* peer got outdated, or was already outdated */
case P_OUTDATED: /* peer got outdated, or was already outdated */
ex_to_string = "peer was fenced";
mask.pdsk = D_MASK;
val.pdsk = D_OUTDATED;
break;
case 5: /* peer was down */
case P_DOWN: /* peer was down */
if (conn_highest_disk(connection) == D_UP_TO_DATE) {
/* we will(have) create(d) a new UUID anyways... */
ex_to_string = "peer is unreachable, assumed to be dead";
@ -523,7 +523,7 @@ bool conn_try_outdate_peer(struct drbd_connection *connection)
ex_to_string = "peer unreachable, doing nothing since disk != UpToDate";
}
break;
case 6: /* Peer is primary, voluntarily outdate myself.
case P_PRIMARY: /* Peer is primary, voluntarily outdate myself.
* This is useful when an unconnected R_SECONDARY is asked to
* become R_PRIMARY, but finds the other peer being active. */
ex_to_string = "peer is active";
@ -531,7 +531,9 @@ bool conn_try_outdate_peer(struct drbd_connection *connection)
mask.disk = D_MASK;
val.disk = D_OUTDATED;
break;
case 7:
case P_FENCING:
/* THINK: do we need to handle this
* like case 4, or more like case 5? */
if (fp != FP_STONITH)
drbd_err(connection, "fence-peer() = 7 && fencing != Stonith !!!\n");
ex_to_string = "peer was stonithed";

View File

@ -25,7 +25,7 @@
#include <linux/module.h>
#include <asm/uaccess.h>
#include <linux/uaccess.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/proc_fs.h>
@ -122,18 +122,18 @@ static void drbd_syncer_progress(struct drbd_device *device, struct seq_file *se
x = res/50;
y = 20-x;
seq_printf(seq, "\t[");
seq_puts(seq, "\t[");
for (i = 1; i < x; i++)
seq_printf(seq, "=");
seq_printf(seq, ">");
seq_putc(seq, '=');
seq_putc(seq, '>');
for (i = 0; i < y; i++)
seq_printf(seq, ".");
seq_printf(seq, "] ");
seq_puts(seq, "] ");
if (state.conn == C_VERIFY_S || state.conn == C_VERIFY_T)
seq_printf(seq, "verified:");
seq_puts(seq, "verified:");
else
seq_printf(seq, "sync'ed:");
seq_puts(seq, "sync'ed:");
seq_printf(seq, "%3u.%u%% ", res / 10, res % 10);
/* if more than a few GB, display in MB */
@ -146,7 +146,7 @@ static void drbd_syncer_progress(struct drbd_device *device, struct seq_file *se
(unsigned long) Bit2KB(rs_left),
(unsigned long) Bit2KB(rs_total));
seq_printf(seq, "\n\t");
seq_puts(seq, "\n\t");
/* see drivers/md/md.c
* We do not want to overflow, so the order of operands and
@ -175,9 +175,9 @@ static void drbd_syncer_progress(struct drbd_device *device, struct seq_file *se
rt / 3600, (rt % 3600) / 60, rt % 60);
dbdt = Bit2KB(db/dt);
seq_printf(seq, " speed: ");
seq_puts(seq, " speed: ");
seq_printf_with_thousands_grouping(seq, dbdt);
seq_printf(seq, " (");
seq_puts(seq, " (");
/* ------------------------- ~3s average ------------------------ */
if (proc_details >= 1) {
/* this is what drbd_rs_should_slow_down() uses */
@ -188,7 +188,7 @@ static void drbd_syncer_progress(struct drbd_device *device, struct seq_file *se
db = device->rs_mark_left[i] - rs_left;
dbdt = Bit2KB(db/dt);
seq_printf_with_thousands_grouping(seq, dbdt);
seq_printf(seq, " -- ");
seq_puts(seq, " -- ");
}
/* --------------------- long term average ---------------------- */
@ -200,11 +200,11 @@ static void drbd_syncer_progress(struct drbd_device *device, struct seq_file *se
db = rs_total - rs_left;
dbdt = Bit2KB(db/dt);
seq_printf_with_thousands_grouping(seq, dbdt);
seq_printf(seq, ")");
seq_putc(seq, ')');
if (state.conn == C_SYNC_TARGET ||
state.conn == C_VERIFY_S) {
seq_printf(seq, " want: ");
seq_puts(seq, " want: ");
seq_printf_with_thousands_grouping(seq, device->c_sync_rate);
}
seq_printf(seq, " K/sec%s\n", stalled ? " (stalled)" : "");
@ -231,7 +231,7 @@ static void drbd_syncer_progress(struct drbd_device *device, struct seq_file *se
(unsigned long long)bm_bits * BM_SECT_PER_BIT);
if (stop_sector != 0 && stop_sector != ULLONG_MAX)
seq_printf(seq, " stop sector: %llu", stop_sector);
seq_printf(seq, "\n");
seq_putc(seq, '\n');
}
}
@ -276,7 +276,7 @@ static int drbd_seq_show(struct seq_file *seq, void *v)
rcu_read_lock();
idr_for_each_entry(&drbd_devices, device, i) {
if (prev_i != i - 1)
seq_printf(seq, "\n");
seq_putc(seq, '\n');
prev_i = i;
state = device->state;

View File

@ -25,7 +25,7 @@
#include <linux/module.h>
#include <asm/uaccess.h>
#include <linux/uaccess.h>
#include <net/sock.h>
#include <linux/drbd.h>
@ -2289,13 +2289,13 @@ static inline int overlaps(sector_t s1, int l1, sector_t s2, int l2)
static bool overlapping_resync_write(struct drbd_device *device, struct drbd_peer_request *peer_req)
{
struct drbd_peer_request *rs_req;
bool rv = 0;
bool rv = false;
spin_lock_irq(&device->resource->req_lock);
list_for_each_entry(rs_req, &device->sync_ee, w.list) {
if (overlaps(peer_req->i.sector, peer_req->i.size,
rs_req->i.sector, rs_req->i.size)) {
rv = 1;
rv = true;
break;
}
}
@ -2678,7 +2678,7 @@ static int receive_Data(struct drbd_connection *connection, struct packet_info *
}
out_interrupted:
drbd_may_finish_epoch(connection, peer_req->epoch, EV_PUT + EV_CLEANUP);
drbd_may_finish_epoch(connection, peer_req->epoch, EV_PUT | EV_CLEANUP);
put_ldev(device);
drbd_free_peer_req(device, peer_req);
return err;

View File

@ -1000,7 +1000,7 @@ static void complete_conflicting_writes(struct drbd_request *req)
finish_wait(&device->misc_wait, &wait);
}
/* called within req_lock and rcu_read_lock() */
/* called within req_lock */
static void maybe_pull_ahead(struct drbd_device *device)
{
struct drbd_connection *connection = first_peer_device(device)->connection;

View File

@ -2196,9 +2196,7 @@ conn_set_state(struct drbd_connection *connection, union drbd_state mask, union
ns.disk = os.disk;
rv = _drbd_set_state(device, ns, flags, NULL);
if (rv < SS_SUCCESS)
BUG();
BUG_ON(rv < SS_SUCCESS);
ns.i = device->state.i;
ns_max.role = max_role(ns.role, ns_max.role);
ns_max.peer = max_role(ns.peer, ns_max.peer);

View File

@ -140,7 +140,7 @@ extern void drbd_resume_al(struct drbd_device *device);
extern bool conn_all_vols_unconf(struct drbd_connection *connection);
/**
* drbd_request_state() - Reqest a state change
* drbd_request_state() - Request a state change
* @device: DRBD device.
* @mask: mask of state bits to change.
* @val: value of new state bits.

View File

@ -26,7 +26,7 @@
#include <linux/drbd.h>
#include "drbd_strings.h"
static const char *drbd_conn_s_names[] = {
static const char * const drbd_conn_s_names[] = {
[C_STANDALONE] = "StandAlone",
[C_DISCONNECTING] = "Disconnecting",
[C_UNCONNECTED] = "Unconnected",
@ -53,13 +53,13 @@ static const char *drbd_conn_s_names[] = {
[C_BEHIND] = "Behind",
};
static const char *drbd_role_s_names[] = {
static const char * const drbd_role_s_names[] = {
[R_PRIMARY] = "Primary",
[R_SECONDARY] = "Secondary",
[R_UNKNOWN] = "Unknown"
};
static const char *drbd_disk_s_names[] = {
static const char * const drbd_disk_s_names[] = {
[D_DISKLESS] = "Diskless",
[D_ATTACHING] = "Attaching",
[D_FAILED] = "Failed",
@ -71,7 +71,7 @@ static const char *drbd_disk_s_names[] = {
[D_UP_TO_DATE] = "UpToDate",
};
static const char *drbd_state_sw_errors[] = {
static const char * const drbd_state_sw_errors[] = {
[-SS_TWO_PRIMARIES] = "Multiple primaries not allowed by config",
[-SS_NO_UP_TO_DATE_DISK] = "Need access to UpToDate data",
[-SS_NO_LOCAL_DISK] = "Can not resync without local disk",

View File

@ -173,8 +173,8 @@ void drbd_peer_request_endio(struct bio *bio)
{
struct drbd_peer_request *peer_req = bio->bi_private;
struct drbd_device *device = peer_req->peer_device->device;
int is_write = bio_data_dir(bio) == WRITE;
int is_discard = !!(bio_op(bio) == REQ_OP_DISCARD);
bool is_write = bio_data_dir(bio) == WRITE;
bool is_discard = !!(bio_op(bio) == REQ_OP_DISCARD);
if (bio->bi_error && __ratelimit(&drbd_ratelimit_state))
drbd_warn(device, "%s: error=%d s=%llus\n",
@ -1039,7 +1039,6 @@ static void move_to_net_ee_or_free(struct drbd_device *device, struct drbd_peer_
/**
* w_e_end_data_req() - Worker callback, to send a P_DATA_REPLY packet in response to a P_DATA_REQUEST
* @device: DRBD device.
* @w: work object.
* @cancel: The connection will be closed anyways
*/
@ -1700,7 +1699,7 @@ static bool use_checksum_based_resync(struct drbd_connection *connection, struct
rcu_read_unlock();
return connection->agreed_pro_version >= 89 && /* supported? */
connection->csums_tfm && /* configured? */
(csums_after_crash_only == 0 /* use for each resync? */
(csums_after_crash_only == false /* use for each resync? */
|| test_bit(CRASHED_PRIMARY, &device->flags)); /* or only after Primary crash? */
}
@ -1835,7 +1834,7 @@ void drbd_start_resync(struct drbd_device *device, enum drbd_conns side)
device->bm_resync_fo = 0;
device->use_csums = use_checksum_based_resync(connection, device);
} else {
device->use_csums = 0;
device->use_csums = false;
}
/* Since protocol 96, we must serialize drbd_gen_and_send_sync_uuid

View File

@ -370,6 +370,14 @@ enum drbd_notification_type {
NOTIFY_FLAGS = NOTIFY_CONTINUES,
};
enum drbd_peer_state {
P_INCONSISTENT = 3,
P_OUTDATED = 4,
P_DOWN = 5,
P_PRIMARY = 6,
P_FENCING = 7,
};
#define UUID_JUST_CREATED ((__u64)4)
enum write_ordering_e {