lkml.org 
[lkml]   [2010]   [Mar]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: [PATCH 1/6] sysfs: Basic support for multiple super blocks
    From
    Date
    Le mardi 30 mars 2010 à 11:31 -0700, Eric W. Biederman a écrit :
    > From: Eric W. Biederman <ebiederm@xmission.com>
    >
    > Add all of the necessary bioler plate to support
    > multiple superblocks in sysfs.
    >
    > Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
    > ---
    > fs/sysfs/mount.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
    > fs/sysfs/sysfs.h | 3 ++
    > 2 files changed, 59 insertions(+), 2 deletions(-)
    >
    > diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
    > index 0cb1088..6a433ac 100644
    > --- a/fs/sysfs/mount.c
    > +++ b/fs/sysfs/mount.c
    > @@ -71,16 +71,70 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
    > return 0;
    > }
    >
    > +static int sysfs_test_super(struct super_block *sb, void *data)
    > +{
    > + struct sysfs_super_info *sb_info = sysfs_info(sb);
    > + struct sysfs_super_info *info = data;
    > + int found = 1;
    > + return found;
    > +}
    > +
    > +static int sysfs_set_super(struct super_block *sb, void *data)
    > +{
    > + int error;
    > + error = set_anon_super(sb, data);
    > + if (!error)
    > + sb->s_fs_info = data;
    > + return error;
    > +}
    > +
    > static int sysfs_get_sb(struct file_system_type *fs_type,
    > int flags, const char *dev_name, void *data, struct vfsmount *mnt)
    > {
    > - return get_sb_single(fs_type, flags, data, sysfs_fill_super, mnt);
    > + struct sysfs_super_info *info;
    > + struct super_block *sb;
    > + int error;
    > +
    > + error = -ENOMEM;
    > + info = kzalloc(sizeof(*info), GFP_KERNEL);
    > + if (!info)
    > + goto out;
    > + sb = sget(fs_type, sysfs_test_super, sysfs_set_super, info);
    > + if (IS_ERR(sb) || sb->s_fs_info != info)
    > + kfree(info);
    > + if (IS_ERR(sb)) {
    > + kfree(info);

    double kfree(info) ?

    > + error = PTR_ERR(sb);
    > + goto out;
    > + }
    > +


    --
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2010-03-30 21:25    [W:0.024 / U:30.852 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site