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fs: configfs: Factor out configfs_do_depend_item()

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configfs_depend_item() is quite complicated and should
be split up into smaller functions. This also allow to
share this code with other functions.

Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Krzysztof Opasiak 2015-12-11 16:06:10 +01:00 committed by Nicholas Bellinger
parent 9a9e3415ed
commit 9fb434e754
1 changed files with 26 additions and 15 deletions
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41
fs/configfs/dir.c
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@ -1054,6 +1054,31 @@ static int configfs_depend_prep(struct dentry *origin,
return ret;
}
static int configfs_do_depend_item(struct dentry *subsys_dentry,
struct config_item *target)
{
struct configfs_dirent *p;
int ret;
spin_lock(&configfs_dirent_lock);
/* Scan the tree, return 0 if found */
ret = configfs_depend_prep(subsys_dentry, target);
if (ret)
goto out_unlock_dirent_lock;
/*
* We are sure that the item is not about to be removed by rmdir(), and
* not in the middle of attachment by mkdir().
*/
p = target->ci_dentry->d_fsdata;
p->s_dependent_count += 1;
out_unlock_dirent_lock:
spin_unlock(&configfs_dirent_lock);
return ret;
}
int configfs_depend_item(struct configfs_subsystem *subsys,
struct config_item *target)
{
@ -1094,22 +1119,8 @@ int configfs_depend_item(struct configfs_subsystem *subsys,
}
/* Ok, now we can trust subsys/s_item */
ret = configfs_do_depend_item(subsys_sd->s_dentry, target);
spin_lock(&configfs_dirent_lock);
/* Scan the tree, return 0 if found */
ret = configfs_depend_prep(subsys_sd->s_dentry, target);
if (ret)
goto out_unlock_dirent_lock;
/*
* We are sure that the item is not about to be removed by rmdir(), and
* not in the middle of attachment by mkdir().
*/
p = target->ci_dentry->d_fsdata;
p->s_dependent_count += 1;
out_unlock_dirent_lock:
spin_unlock(&configfs_dirent_lock);
out_unlock_fs:
mutex_unlock(&d_inode(root)->i_mutex);