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Message-Id: <d91e3660266d3a2956c4d1aebc9cb618081b21ef.1285278339.git.matthltc@us.ibm.com> Date: Thu, 23 Sep 2010 14:53:28 -0700 From: Matt Helsley <matthltc@...ibm.com> To: containers@...ts.linux-foundation.org Cc: Matt Helsley <matthltc@...ibm.com>, "Theodore Ts'o" <tytso@....edu>, Andreas Dilger <adilger.kernel@...ger.ca>, Jan Kara <jack@...e.cz>, linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org, Al Viro <viro@...iv.linux.org.uk> Subject: [PATCH 2/6] [RFC] Create the .relink file_operation Not all filesystems will necessarily be able to support relinking an orphan inode back into the filesystem. Some offlist feedback suggested that instead of overloading .link that relinking should be a separate file operation for this reason. Since .relink is a superset of .link make the VFS call .relink where possible and .link otherwise. The next commit will change ext3/4 to enable this operation. Signed-off-by: Matt Helsley <matthltc@...ibm.com> Cc: Theodore Ts'o <tytso@....edu> Cc: Andreas Dilger <adilger.kernel@...ger.ca> Cc: Jan Kara <jack@...e.cz> Cc: linux-fsdevel@...r.kernel.org Cc: linux-ext4@...r.kernel.org Cc: Al Viro <viro@...iv.linux.org.uk> --- fs/namei.c | 5 ++++- include/linux/fs.h | 1 + 2 files changed, 5 insertions(+), 1 deletions(-) diff --git a/fs/namei.c b/fs/namei.c index a7dce91..eb279e3 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -2446,7 +2446,10 @@ int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_de return error; mutex_lock(&inode->i_mutex); - error = dir->i_op->link(old_dentry, dir, new_dentry); + if (dir->i_op->relink) + error = dir->i_op->relink(old_dentry, dir, new_dentry); + else + error = dir->i_op->link(old_dentry, dir, new_dentry); mutex_unlock(&inode->i_mutex); if (!error) fsnotify_link(dir, inode, new_dentry); diff --git a/include/linux/fs.h b/include/linux/fs.h index ee725ff..d932eb7 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1528,6 +1528,7 @@ struct inode_operations { int (*create) (struct inode *,struct dentry *,int, struct nameidata *); struct dentry * (*lookup) (struct inode *,struct dentry *, struct nameidata *); int (*link) (struct dentry *,struct inode *,struct dentry *); + int (*relink) (struct dentry *,struct inode *,struct dentry *); int (*unlink) (struct inode *,struct dentry *); int (*symlink) (struct inode *,struct dentry *,const char *); int (*mkdir) (struct inode *,struct dentry *,int); -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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