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fs: switch ->s_uuid to uuid_t

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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 <[email protected]>
Reviewed-by: Amir Goldstein <[email protected]>
Acked-by: Mimi Zohar <[email protected]> (Changes to IMA/EVM)
Reviewed-by: Andy Shevchenko <[email protected]>
This commit is contained in:
Christoph Hellwig 2017-05-10 15:06:33 +02:00
commit 85787090a2
14 changed files with 23 additions and 36 deletions
Download patch file Download diff file Expand all files Collapse all files

2
fs/gfs2/ops_fstype.c
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@ -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);
}
/**

22
fs/gfs2/sys.c
View file

@ -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;
}