@@ -233,12 +233,12 @@ static int tmem_cleancache_init_fs(size_t pagesize)
return xen_tmem_new_pool(uuid_private, 0, pagesize);
}
-static int tmem_cleancache_init_shared_fs(char *uuid, size_t pagesize)
+static int tmem_cleancache_init_shared_fs(uuid_t *uuid, size_t pagesize)
{
struct tmem_pool_uuid shared_uuid;
- shared_uuid.uuid_lo = *(u64 *)uuid;
- shared_uuid.uuid_hi = *(u64 *)(&uuid[8]);
+ shared_uuid.uuid_lo = *(u64 *)&uuid->b[0];
+ shared_uuid.uuid_hi = *(u64 *)&uuid->b[8];
return xen_tmem_new_pool(shared_uuid, TMEM_POOL_SHARED, pagesize);
}
@@ -3951,7 +3951,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
sb->s_qcop = &ext4_qctl_operations;
sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
#endif
- memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid));
+ memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid));
INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
mutex_init(&sbi->s_orphan_lock);
@@ -1937,7 +1937,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_time_gran = 1;
sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
(test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
- memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
+ memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
/* init f2fs-specific super block info */
sbi->valid_super_block = valid_super_block;
@@ -203,7 +203,7 @@ static void gfs2_sb_in(struct gfs2_sbd *sdp, const void *buf)
memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN);
memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN);
- memcpy(s->s_uuid, str->sb_uuid, 16);
+ memcpy(&s->s_uuid, str->sb_uuid, 16);
}
/**
@@ -71,25 +71,14 @@ static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
}
-static int gfs2_uuid_valid(const u8 *uuid)
-{
- int i;
-
- for (i = 0; i < 16; i++) {
- if (uuid[i])
- return 1;
- }
- return 0;
-}
-
static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
{
struct super_block *s = sdp->sd_vfs;
- const u8 *uuid = s->s_uuid;
+
buf[0] = '\0';
- if (!gfs2_uuid_valid(uuid))
+ if (uuid_is_null(&s->s_uuid))
return 0;
- return snprintf(buf, PAGE_SIZE, "%pUB\n", uuid);
+ return snprintf(buf, PAGE_SIZE, "%pUB\n", &s->s_uuid);
}
static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
@@ -712,14 +701,13 @@ static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
{
struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
struct super_block *s = sdp->sd_vfs;
- const u8 *uuid = s->s_uuid;
add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid);
- if (gfs2_uuid_valid(uuid))
- add_uevent_var(env, "UUID=%pUB", uuid);
+ if (!uuid_is_null(&s->s_uuid))
+ add_uevent_var(env, "UUID=%pUB", &s->s_uuid);
return 0;
}
@@ -2062,7 +2062,7 @@ static int ocfs2_initialize_super(struct super_block *sb,
cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
- memcpy(sb->s_uuid, di->id2.i_super.s_uuid,
+ memcpy(&sb->s_uuid, di->id2.i_super.s_uuid,
sizeof(di->id2.i_super.s_uuid));
osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
@@ -75,7 +75,7 @@ xfs_uuid_mount(
/* Publish UUID in struct super_block */
BUILD_BUG_ON(sizeof(mp->m_super->s_uuid) != sizeof(uuid_t));
- memcpy(&mp->m_super->s_uuid, uuid, sizeof(uuid_t));
+ uuid_copy(&mp->m_super->s_uuid, uuid);
if (mp->m_flags & XFS_MOUNT_NOUUID)
return 0;
@@ -27,7 +27,7 @@ struct cleancache_filekey {
struct cleancache_ops {
int (*init_fs)(size_t);
- int (*init_shared_fs)(char *uuid, size_t);
+ int (*init_shared_fs)(uuid_t *uuid, size_t);
int (*get_page)(int, struct cleancache_filekey,
pgoff_t, struct page *);
void (*put_page)(int, struct cleancache_filekey,
@@ -30,6 +30,7 @@
#include <linux/percpu-rwsem.h>
#include <linux/workqueue.h>
#include <linux/delayed_call.h>
+#include <linux/uuid.h>
#include <asm/byteorder.h>
#include <uapi/linux/fs.h>
@@ -1326,8 +1327,8 @@ struct super_block {
struct sb_writers s_writers;
- char s_id[32]; /* Informational name */
- u8 s_uuid[16]; /* UUID */
+ char s_id[32]; /* Informational name */
+ uuid_t s_uuid; /* UUID */
void *s_fs_info; /* Filesystem private info */
unsigned int s_max_links;
@@ -130,7 +130,7 @@ void __cleancache_init_shared_fs(struct super_block *sb)
int pool_id = CLEANCACHE_NO_BACKEND_SHARED;
if (cleancache_ops) {
- pool_id = cleancache_ops->init_shared_fs(sb->s_uuid, PAGE_SIZE);
+ pool_id = cleancache_ops->init_shared_fs(&sb->s_uuid, PAGE_SIZE);
if (pool_id < 0)
pool_id = CLEANCACHE_NO_POOL;
}
@@ -164,7 +164,7 @@ static void hmac_add_misc(struct shash_desc *desc, struct inode *inode,
hmac_misc.mode = inode->i_mode;
crypto_shash_update(desc, (const u8 *)&hmac_misc, sizeof(hmac_misc));
if (evm_hmac_attrs & EVM_ATTR_FSUUID)
- crypto_shash_update(desc, inode->i_sb->s_uuid,
+ crypto_shash_update(desc, &inode->i_sb->s_uuid.b[0],
sizeof(inode->i_sb->s_uuid));
crypto_shash_final(desc, digest);
}
@@ -244,7 +244,7 @@ static bool ima_match_rules(struct ima_rule_entry *rule, struct inode *inode,
&& rule->fsmagic != inode->i_sb->s_magic)
return false;
if ((rule->flags & IMA_FSUUID) &&
- memcmp(&rule->fsuuid, inode->i_sb->s_uuid, sizeof(rule->fsuuid)))
+ !uuid_equal(&rule->fsuuid, &inode->i_sb->s_uuid))
return false;
if ((rule->flags & IMA_UID) && !rule->uid_op(cred->uid, rule->uid))
return false;
For some file systems we still memcpy into it, but in various places this already allows us to use the proper uuid helpers. More to come.. Signed-off-by: Christoph Hellwig <hch@lst.de> --- drivers/xen/tmem.c | 6 +++--- fs/ext4/super.c | 2 +- fs/f2fs/super.c | 2 +- fs/gfs2/ops_fstype.c | 2 +- fs/gfs2/sys.c | 22 +++++----------------- fs/ocfs2/super.c | 2 +- fs/xfs/xfs_mount.c | 2 +- include/linux/cleancache.h | 2 +- include/linux/fs.h | 5 +++-- mm/cleancache.c | 2 +- security/integrity/evm/evm_crypto.c | 2 +- security/integrity/ima/ima_policy.c | 2 +- 12 files changed, 20 insertions(+), 31 deletions(-)