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Date: Thu, 10 Jan 2019 15:41:53 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Christoph Hellwig <hch@....de>, linux-kernel@...r.kernel.org,
Dave Kleikamp <shaggy@...nel.org>,
jfs-discussion@...ts.sourceforge.net
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1] fs/jfs: Switch to use new generic UUID API
There are new types and helpers that are supposed to be used in new code.
As a preparation to get rid of legacy types and API functions do
the conversion here.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
- not tested on real FS
fs/jfs/jfs_incore.h | 6 ++++--
fs/jfs/jfs_logmgr.c | 17 ++++++++---------
fs/jfs/jfs_logmgr.h | 10 +++++-----
fs/jfs/jfs_mount.c | 4 ++--
fs/jfs/jfs_superblock.h | 7 ++++---
fs/jfs/super.c | 5 +++--
6 files changed, 26 insertions(+), 23 deletions(-)
diff --git a/fs/jfs/jfs_incore.h b/fs/jfs/jfs_incore.h
index 912a3af2393e..340eb8e4f716 100644
--- a/fs/jfs/jfs_incore.h
+++ b/fs/jfs/jfs_incore.h
@@ -23,6 +23,8 @@
#include <linux/rwsem.h>
#include <linux/slab.h>
#include <linux/bitops.h>
+#include <linux/uuid.h>
+
#include "jfs_types.h"
#include "jfs_xtree.h"
#include "jfs_dtree.h"
@@ -178,8 +180,8 @@ struct jfs_sb_info {
pxd_t logpxd; /* pxd describing log */
pxd_t fsckpxd; /* pxd describing fsck wkspc */
pxd_t ait2; /* pxd describing AIT copy */
- char uuid[16]; /* 128-bit uuid for volume */
- char loguuid[16]; /* 128-bit uuid for log */
+ uuid_t uuid; /* 128-bit uuid for volume */
+ uuid_t loguuid; /* 128-bit uuid for log */
/*
* commit_state is used for synchronization of the jfs_commit
* threads. It is protected by LAZY_LOCK().
diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index 6b68df395892..6361fa4d85db 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -1092,8 +1092,7 @@ int lmLogOpen(struct super_block *sb)
mutex_lock(&jfs_log_mutex);
list_for_each_entry(log, &jfs_external_logs, journal_list) {
if (log->bdev->bd_dev == sbi->logdev) {
- if (memcmp(log->uuid, sbi->loguuid,
- sizeof(log->uuid))) {
+ if (!uuid_equal(&log->uuid, &sbi->loguuid)) {
jfs_warn("wrong uuid on JFS journal");
mutex_unlock(&jfs_log_mutex);
return -EINVAL;
@@ -1130,7 +1129,7 @@ int lmLogOpen(struct super_block *sb)
}
log->bdev = bdev;
- memcpy(log->uuid, sbi->loguuid, sizeof(log->uuid));
+ uuid_copy(&log->uuid, &sbi->loguuid);
/*
* initialize log:
@@ -1336,7 +1335,7 @@ int lmLogInit(struct jfs_log * log)
jfs_info("lmLogInit: inline log:0x%p base:0x%Lx size:0x%x",
log, (unsigned long long)log->base, log->size);
} else {
- if (memcmp(logsuper->uuid, log->uuid, 16)) {
+ if (!uuid_equal(&logsuper->uuid, &log->uuid)) {
jfs_warn("wrong uuid on JFS log device");
goto errout20;
}
@@ -1732,7 +1731,7 @@ static int lmLogFileSystem(struct jfs_log * log, struct jfs_sb_info *sbi,
int i;
struct logsuper *logsuper;
struct lbuf *bpsuper;
- char *uuid = sbi->uuid;
+ uuid_t *uuid = &sbi->uuid;
/*
* insert/remove file system device to log active file system list.
@@ -1743,8 +1742,8 @@ static int lmLogFileSystem(struct jfs_log * log, struct jfs_sb_info *sbi,
logsuper = (struct logsuper *) bpsuper->l_ldata;
if (activate) {
for (i = 0; i < MAX_ACTIVE; i++)
- if (!memcmp(logsuper->active[i].uuid, NULL_UUID, 16)) {
- memcpy(logsuper->active[i].uuid, uuid, 16);
+ if (uuid_is_null(&logsuper->active[i].uuid)) {
+ uuid_copy(&logsuper->active[i].uuid, uuid);
sbi->aggregate = i;
break;
}
@@ -1755,8 +1754,8 @@ static int lmLogFileSystem(struct jfs_log * log, struct jfs_sb_info *sbi,
}
} else {
for (i = 0; i < MAX_ACTIVE; i++)
- if (!memcmp(logsuper->active[i].uuid, uuid, 16)) {
- memcpy(logsuper->active[i].uuid, NULL_UUID, 16);
+ if (uuid_equal(&logsuper->active[i].uuid, uuid)) {
+ uuid_copy(&logsuper->active[i].uuid, &uuid_null);
break;
}
if (i == MAX_ACTIVE) {
diff --git a/fs/jfs/jfs_logmgr.h b/fs/jfs/jfs_logmgr.h
index e38c21598850..870fc22360e7 100644
--- a/fs/jfs/jfs_logmgr.h
+++ b/fs/jfs/jfs_logmgr.h
@@ -19,6 +19,8 @@
#ifndef _H_JFS_LOGMGR
#define _H_JFS_LOGMGR
+#include <linux/uuid.h>
+
#include "jfs_filsys.h"
#include "jfs_lock.h"
@@ -73,15 +75,13 @@ struct logsuper {
__le32 state; /* 4: state - see below */
__le32 end; /* 4: addr of last log record set by logredo */
- char uuid[16]; /* 16: 128-bit journal uuid */
+ uuid_t uuid; /* 16: 128-bit journal uuid */
char label[16]; /* 16: journal label */
struct {
- char uuid[16];
+ uuid_t uuid;
} active[MAX_ACTIVE]; /* 2048: active file systems list */
};
-#define NULL_UUID "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
-
/* log flag: commit option (see jfs_filsys.h) */
/* log state */
@@ -410,7 +410,7 @@ struct jfs_log {
spinlock_t synclock; /* 4: synclist lock */
struct lbuf *wqueue; /* 4: log pageout queue */
int count; /* 4: count */
- char uuid[16]; /* 16: 128-bit uuid of log device */
+ uuid_t uuid; /* 16: 128-bit uuid of log device */
int no_integrity; /* 3: flag to disable journaling to disk */
};
diff --git a/fs/jfs/jfs_mount.c b/fs/jfs/jfs_mount.c
index d8658607bf46..c9c1f16b93df 100644
--- a/fs/jfs/jfs_mount.c
+++ b/fs/jfs/jfs_mount.c
@@ -389,8 +389,8 @@ static int chkSuper(struct super_block *sb)
sbi->logpxd = j_sb->s_logpxd;
else {
sbi->logdev = new_decode_dev(le32_to_cpu(j_sb->s_logdev));
- memcpy(sbi->uuid, j_sb->s_uuid, sizeof(sbi->uuid));
- memcpy(sbi->loguuid, j_sb->s_loguuid, sizeof(sbi->uuid));
+ uuid_copy(&sbi->uuid, &j_sb->s_uuid);
+ uuid_copy(&sbi->loguuid, &j_sb->s_loguuid);
}
sbi->fsckpxd = j_sb->s_fsckpxd;
sbi->ait2 = j_sb->s_ait2;
diff --git a/fs/jfs/jfs_superblock.h b/fs/jfs/jfs_superblock.h
index 04847b8d3070..0a401f083d1a 100644
--- a/fs/jfs/jfs_superblock.h
+++ b/fs/jfs/jfs_superblock.h
@@ -18,6 +18,8 @@
#ifndef _H_JFS_SUPERBLOCK
#define _H_JFS_SUPERBLOCK
+#include <linux/uuid.h>
+
/*
* make the magic number something a human could read
*/
@@ -100,10 +102,9 @@ struct jfs_superblock {
pxd_t s_xlogpxd; /* 8: extendfs logpxd */
/* - 128 byte boundary - */
- char s_uuid[16]; /* 16: 128-bit uuid for volume */
+ uuid_t s_uuid; /* 16: 128-bit uuid for volume */
char s_label[16]; /* 16: volume label */
- char s_loguuid[16]; /* 16: 128-bit uuid for log device */
-
+ uuid_t s_loguuid; /* 16: 128-bit uuid for log device */
};
extern int readSuper(struct super_block *, struct buffer_head **);
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 65d8fc87ab11..99a43e7f6ee0 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -174,8 +174,9 @@ static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)
buf->f_files = maxinodes;
buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
atomic_read(&imap->im_numfree));
- buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2);
- buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2,
+ buf->f_fsid.val[0] = (u32)crc32_le(0, (char *)&sbi->uuid,
+ sizeof(sbi->uuid)/2);
+ buf->f_fsid.val[1] = (u32)crc32_le(0, (char *)&sbi->uuid + sizeof(sbi->uuid)/2,
sizeof(sbi->uuid)/2);
buf->f_namelen = JFS_NAME_MAX;
--
2.20.1
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