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xfs: add xfs_mount sysfs kobject

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Embed a base kobject into xfs_mount. This creates a kobject associated
with each XFS mount and a subdirectory in sysfs with the name of the
filesystem. The subdirectory lifecycle matches that of the mount. Also
add the new xfs_sysfs.[c,h] source files with some XFS sysfs
infrastructure to facilitate attribute creation.

Note that there are currently no attributes exported as part of the
xfs_mount kobject. It exists solely to serve as a per-mount container
for child objects.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Brian Foster
2014-07-15 08:07:01 +10:00
committed by Dave Chinner
parent 3d8712265c
commit a31b1d3d89
6 changed files with 133 additions and 1 deletions
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14
fs/xfs/xfs_mount.c
View File

@@ -42,6 +42,7 @@
#include "xfs_trace.h"
#include "xfs_icache.h"
#include "xfs_dinode.h"
#include "xfs_sysfs.h"
#ifdef HAVE_PERCPU_SB
@@ -60,6 +61,8 @@ static DEFINE_MUTEX(xfs_uuid_table_mutex);
static int xfs_uuid_table_size;
static uuid_t *xfs_uuid_table;
extern struct kset *xfs_kset;
/*
* See if the UUID is unique among mounted XFS filesystems.
* Mount fails if UUID is nil or a FS with the same UUID is already mounted.
@@ -731,10 +734,15 @@ xfs_mountfs(
xfs_set_maxicount(mp);
error = xfs_uuid_mount(mp);
mp->m_kobj.kobject.kset = xfs_kset;
error = xfs_sysfs_init(&mp->m_kobj, &xfs_mp_ktype, NULL, mp->m_fsname);
if (error)
goto out;
error = xfs_uuid_mount(mp);
if (error)
goto out_remove_sysfs;
/*
* Set the minimum read and write sizes
*/
@@ -989,6 +997,8 @@ xfs_mountfs(
xfs_da_unmount(mp);
out_remove_uuid:
xfs_uuid_unmount(mp);
out_remove_sysfs:
xfs_sysfs_del(&mp->m_kobj);
out:
return error;
}
@@ -1071,6 +1081,8 @@ xfs_unmountfs(
xfs_errortag_clearall(mp, 0);
#endif
xfs_free_perag(mp);
xfs_sysfs_del(&mp->m_kobj);
}
int