[PATCH v6 04/12] xfs: use super s_id instead of mount info m_fsname

Ian Kent
2019-10-16T00:41:27Z

Eliminate mount info field m_fsname by using the super block s_id
field directly.

Signed-off-by: Ian Kent <raven@themaw.net>
---
fs/xfs/xfs_error.c | 2 +-
fs/xfs/xfs_log.c | 2 +-
fs/xfs/xfs_message.c | 4 ++--
fs/xfs/xfs_mount.c | 5 +++--
fs/xfs/xfs_mount.h | 1 -
fs/xfs/xfs_pnfs.c | 2 +-
fs/xfs/xfs_super.c | 35 +++++++++++++----------------------
fs/xfs/xfs_trans_ail.c | 2 +-
8 files changed, 22 insertions(+), 31 deletions(-)

diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c
index 849fd4476950..3ff3fc202522 100644
--- a/fs/xfs/xfs_error.c
+++ b/fs/xfs/xfs_error.c
@@ -257,7 +257,7 @@ xfs_errortag_test(

xfs_warn_ratelimited(mp,
"Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
- expression, file, line, mp->m_fsname);
+ expression, file, line, mp->m_super->s_id);
return true;
}

diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index a2beee9f74da..ed99f4f063c3 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -1479,7 +1479,7 @@ xlog_alloc_log(

log->l_ioend_workqueue = alloc_workqueue("xfs-log/%s",
WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_HIGHPRI, 0,
- mp->m_fsname);
+ mp->m_super->s_id);
if (!log->l_ioend_workqueue)
goto out_free_iclog;

diff --git a/fs/xfs/xfs_message.c b/fs/xfs/xfs_message.c
index 9804efe525a9..aaea6faf5acc 100644
--- a/fs/xfs/xfs_message.c
+++ b/fs/xfs/xfs_message.c
@@ -20,8 +20,8 @@ __xfs_printk(
const struct xfs_mount *mp,
struct va_format *vaf)
{
- if (mp && mp->m_fsname) {
- printk("%sXFS (%s): %pV\n", level, mp->m_fsname, vaf);
+ if (mp && mp->m_super && mp->m_super->s_id) {
+ printk("%sXFS (%s): %pV\n", level, mp->m_super->s_id, vaf);
return;
}
printk("%sXFS: %pV\n", level, vaf);
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index ba5b6f3b2b88..b6145a70a593 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -706,7 +706,8 @@ xfs_mountfs(
/* enable fail_at_unmount as default */
mp->m_fail_unmount = true;

- error = xfs_sysfs_init(&mp->m_kobj, &xfs_mp_ktype, NULL, mp->m_fsname);
+ error = xfs_sysfs_init(&mp->m_kobj, &xfs_mp_ktype,
+ NULL, mp->m_super->s_id);
if (error)
goto out;

@@ -1277,7 +1278,7 @@ xfs_mod_fdblocks(
printk_once(KERN_WARNING
"Filesystem \"%s\": reserve blocks depleted! "
"Consider increasing reserve pool size.",
- mp->m_fsname);
+ mp->m_super->s_id);
fdblocks_enospc:
spin_unlock(&mp->m_sb_lock);
return -ENOSPC;
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index b3230f7ca2bf..f2a9f316fa6c 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -89,7 +89,6 @@ typedef struct xfs_mount {
struct percpu_counter m_delalloc_blks;

struct xfs_buf *m_sb_bp; /* buffer for superblock */
- char *m_fsname; /* filesystem name */
char *m_rtname; /* realtime device name */
char *m_logname; /* external log device name */
int m_bsize; /* fs logical block size */
diff --git a/fs/xfs/xfs_pnfs.c b/fs/xfs/xfs_pnfs.c
index a339bd5fa260..81df10f69ade 100644
--- a/fs/xfs/xfs_pnfs.c
+++ b/fs/xfs/xfs_pnfs.c
@@ -59,7 +59,7 @@ xfs_fs_get_uuid(

printk_once(KERN_NOTICE
"XFS (%s): using experimental pNFS feature, use at your own risk!\n",
- mp->m_fsname);
+ mp->m_super->s_id);

if (*len < sizeof(uuid_t))
return -EINVAL;
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index cfa306f62bec..5876c2b551b5 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -165,14 +165,6 @@ xfs_parseargs(
int iosize = 0;
uint8_t iosizelog = 0;

- /*
- * set up the mount name first so all the errors will refer to the
- * correct device.
- */
- mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
- if (!mp->m_fsname)
- return -ENOMEM;
-
/*
* Copy binary VFS mount flags we are interested in.
*/
@@ -805,33 +797,33 @@ xfs_init_mount_workqueues(
struct xfs_mount *mp)
{
mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s",
- WQ_MEM_RECLAIM|WQ_FREEZABLE, 1, mp->m_fsname);
+ WQ_MEM_RECLAIM|WQ_FREEZABLE, 1, mp->m_super->s_id);
if (!mp->m_buf_workqueue)
goto out;

mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
- WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
+ WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_super->s_id);
if (!mp->m_unwritten_workqueue)
goto out_destroy_buf;

mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s",
WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND,
- 0, mp->m_fsname);
+ 0, mp->m_super->s_id);
if (!mp->m_cil_workqueue)
goto out_destroy_unwritten;

mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
- WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
+ WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_super->s_id);
if (!mp->m_reclaim_workqueue)
goto out_destroy_cil;

mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
- WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
+ WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_super->s_id);
if (!mp->m_eofblocks_workqueue)
goto out_destroy_reclaim;

mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s", WQ_FREEZABLE, 0,
- mp->m_fsname);
+ mp->m_super->s_id);
if (!mp->m_sync_workqueue)
goto out_destroy_eofb;

@@ -1036,10 +1028,9 @@ xfs_fs_drop_inode(
}

STATIC void
-xfs_free_fsname(
+xfs_free_names(
struct xfs_mount *mp)
{
- kfree(mp->m_fsname);
kfree(mp->m_rtname);
kfree(mp->m_logname);
}
@@ -1216,7 +1207,7 @@ xfs_test_remount_options(

tmp_mp->m_super = sb;
error = xfs_parseargs(tmp_mp, options);
- xfs_free_fsname(tmp_mp);
+ xfs_free_names(tmp_mp);
kmem_free(tmp_mp);

return error;
@@ -1591,7 +1582,7 @@ xfs_fs_fill_super(

error = xfs_parseargs(mp, (char *)data);
if (error)
- goto out_free_fsname;
+ goto out_free_names;

sb_min_blocksize(sb, BBSIZE);
sb->s_xattr = xfs_xattr_handlers;
@@ -1618,7 +1609,7 @@ xfs_fs_fill_super(

error = xfs_open_devices(mp);
if (error)
- goto out_free_fsname;
+ goto out_free_names;

error = xfs_init_mount_workqueues(mp);
if (error)
@@ -1755,9 +1746,9 @@ xfs_fs_fill_super(
xfs_destroy_mount_workqueues(mp);
out_close_devices:
xfs_close_devices(mp);
- out_free_fsname:
+ out_free_names:
sb->s_fs_info = NULL;
- xfs_free_fsname(mp);
+ xfs_free_names(mp);
kfree(mp);
out:
return error;
@@ -1789,7 +1780,7 @@ xfs_fs_put_super(
xfs_close_devices(mp);

sb->s_fs_info = NULL;
- xfs_free_fsname(mp);
+ xfs_free_names(mp);
kfree(mp);
}

diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c
index 6ccfd75d3c24..aea71ee189f5 100644
--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@ -836,7 +836,7 @@ xfs_trans_ail_init(
init_waitqueue_head(&ailp->ail_empty);

ailp->ail_task = kthread_run(xfsaild, ailp, "xfsaild/%s",
- ailp->ail_mount->m_fsname);
+ ailp->ail_mount->m_super->s_id);
if (IS_ERR(ailp->ail_task))
goto out_free_ailp;