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| author |   Amir Goldstein <amir73il@gmail.com> | 2018-10-18 18:37:14 +0300 |
|---|---|---|
| committer |   Miklos Szeredi <mszeredi@redhat.com> | 2018-10-26 23:34:40 +0200 |
| commit | 1e92e3072c1456abedf51c9dedd245d2ba0daa4f (patch) | |
| tree | 4d6e3e2299a97e4015a8b84646ee25c3b2db0c9c /fs/overlayfs | |
| parent | ovl: remove the 'locked' argument of ovl_nlink_{start,end} (diff) | |
| download | wireguard-linux-1e92e3072c1456abedf51c9dedd245d2ba0daa4f.tar.xz wireguard-linux-1e92e3072c1456abedf51c9dedd245d2ba0daa4f.zip | |
ovl: abstract ovl_inode lock with a helper
The abstraction improves code readabilty (to some).
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs')
| -rw-r--r-- | fs/overlayfs/overlayfs.h | 10 | ||||
| -rw-r--r-- | fs/overlayfs/util.c | 25 |
2 files changed, 23 insertions, 12 deletions
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index b48ef22ef96b..5e45cb3630a0 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -290,6 +290,16 @@ static inline unsigned int ovl_xino_bits(struct super_block *sb) return ofs->xino_bits; } +static inline int ovl_inode_lock(struct inode *inode) +{ + return mutex_lock_interruptible(&OVL_I(inode)->lock); +} + +static inline void ovl_inode_unlock(struct inode *inode) +{ + mutex_unlock(&OVL_I(inode)->lock); +} + /* namei.c */ int ovl_check_fh_len(struct ovl_fh *fh, int fh_len); diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c index d3a786006729..7c01327b1852 100644 --- a/fs/overlayfs/util.c +++ b/fs/overlayfs/util.c @@ -521,13 +521,13 @@ bool ovl_already_copied_up(struct dentry *dentry, int flags) int ovl_copy_up_start(struct dentry *dentry, int flags) { - struct ovl_inode *oi = OVL_I(d_inode(dentry)); + struct inode *inode = d_inode(dentry); int err; - err = mutex_lock_interruptible(&oi->lock); + err = ovl_inode_lock(inode); if (!err && ovl_already_copied_up_locked(dentry, flags)) { err = 1; /* Already copied up */ - mutex_unlock(&oi->lock); + ovl_inode_unlock(inode); } return err; @@ -535,7 +535,7 @@ int ovl_copy_up_start(struct dentry *dentry, int flags) void ovl_copy_up_end(struct dentry *dentry) { - mutex_unlock(&OVL_I(d_inode(dentry))->lock); + ovl_inode_unlock(d_inode(dentry)); } bool ovl_check_origin_xattr(struct dentry *dentry) @@ -740,11 +740,11 @@ fail: */ int ovl_nlink_start(struct dentry *dentry) { - struct ovl_inode *oi = OVL_I(d_inode(dentry)); + struct inode *inode = d_inode(dentry); const struct cred *old_cred; int err; - if (WARN_ON(!d_inode(dentry))) + if (WARN_ON(!inode)) return -ENOENT; /* @@ -767,11 +767,11 @@ int ovl_nlink_start(struct dentry *dentry) return err; } - err = mutex_lock_interruptible(&oi->lock); + err = ovl_inode_lock(inode); if (err) return err; - if (d_is_dir(dentry) || !ovl_test_flag(OVL_INDEX, d_inode(dentry))) + if (d_is_dir(dentry) || !ovl_test_flag(OVL_INDEX, inode)) goto out; old_cred = ovl_override_creds(dentry->d_sb); @@ -786,15 +786,16 @@ int ovl_nlink_start(struct dentry *dentry) out: if (err) - mutex_unlock(&oi->lock); + ovl_inode_unlock(inode); return err; } void ovl_nlink_end(struct dentry *dentry) { - if (ovl_test_flag(OVL_INDEX, d_inode(dentry)) && - d_inode(dentry)->i_nlink == 0) { + struct inode *inode = d_inode(dentry); + + if (ovl_test_flag(OVL_INDEX, inode) && inode->i_nlink == 0) { const struct cred *old_cred; old_cred = ovl_override_creds(dentry->d_sb); @@ -802,7 +803,7 @@ void ovl_nlink_end(struct dentry *dentry) revert_creds(old_cred); } - mutex_unlock(&OVL_I(d_inode(dentry))->lock); + ovl_inode_unlock(inode); } int ovl_lock_rename_workdir(struct dentry *workdir, struct dentry *upperdir) |