From: Mark Fasheh Date: Fri, 8 Sep 2006 21:22:21 +0000 (-0700) Subject: [PATCH] Allow file systems to manually d_move() inside of ->rename() X-Git-Tag: v2.6.19-rc1~1259^2~19 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=349457ccf2592c14bdf13b6706170ae2e94931b1;p=linux-2.6 [PATCH] Allow file systems to manually d_move() inside of ->rename() Some file systems want to manually d_move() the dentries involved in a rename. We can do this by making use of the FS_ODD_RENAME flag if we just have nfs_rename() unconditionally do the d_move(). While there, we rename the flag to be more descriptive. OCFS2 uses this to protect that part of the rename operation with a cluster lock. Signed-off-by: Mark Fasheh Cc: Trond Myklebust Cc: Al Viro Cc: Christoph Hellwig Signed-off-by: Andrew Morton --- diff --git a/fs/namei.c b/fs/namei.c index 432d6bc6fa..6b591c01b0 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -2370,7 +2370,8 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry, dput(new_dentry); } if (!error) - d_move(old_dentry,new_dentry); + if (!(old_dir->i_sb->s_type->fs_flags & FS_RENAME_DOES_D_MOVE)) + d_move(old_dentry,new_dentry); return error; } @@ -2393,8 +2394,7 @@ static int vfs_rename_other(struct inode *old_dir, struct dentry *old_dentry, else error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry); if (!error) { - /* The following d_move() should become unconditional */ - if (!(old_dir->i_sb->s_type->fs_flags & FS_ODD_RENAME)) + if (!(old_dir->i_sb->s_type->fs_flags & FS_RENAME_DOES_D_MOVE)) d_move(old_dentry, new_dentry); } if (target) diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 3419c2da9b..7432f1a43f 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -1669,8 +1669,7 @@ out: if (rehash) d_rehash(rehash); if (!error) { - if (!S_ISDIR(old_inode->i_mode)) - d_move(old_dentry, new_dentry); + d_move(old_dentry, new_dentry); nfs_renew_times(new_dentry); nfs_set_verifier(new_dentry, nfs_save_change_attribute(new_dir)); } diff --git a/fs/nfs/super.c b/fs/nfs/super.c index b99113b0f6..e8d40030ca 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -71,7 +71,7 @@ static struct file_system_type nfs_fs_type = { .name = "nfs", .get_sb = nfs_get_sb, .kill_sb = nfs_kill_super, - .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, + .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, }; struct file_system_type nfs_xdev_fs_type = { @@ -79,7 +79,7 @@ struct file_system_type nfs_xdev_fs_type = { .name = "nfs", .get_sb = nfs_xdev_get_sb, .kill_sb = nfs_kill_super, - .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, + .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, }; static struct super_operations nfs_sops = { @@ -107,7 +107,7 @@ static struct file_system_type nfs4_fs_type = { .name = "nfs4", .get_sb = nfs4_get_sb, .kill_sb = nfs4_kill_super, - .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, + .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, }; struct file_system_type nfs4_xdev_fs_type = { @@ -115,7 +115,7 @@ struct file_system_type nfs4_xdev_fs_type = { .name = "nfs4", .get_sb = nfs4_xdev_get_sb, .kill_sb = nfs4_kill_super, - .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, + .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, }; struct file_system_type nfs4_referral_fs_type = { @@ -123,7 +123,7 @@ struct file_system_type nfs4_referral_fs_type = { .name = "nfs4", .get_sb = nfs4_referral_get_sb, .kill_sb = nfs4_kill_super, - .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, + .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, }; static struct super_operations nfs4_sops = { diff --git a/include/linux/fs.h b/include/linux/fs.h index 555bc195c4..1d3e601ece 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -92,9 +92,10 @@ extern int dir_notify_enable; #define FS_REQUIRES_DEV 1 #define FS_BINARY_MOUNTDATA 2 #define FS_REVAL_DOT 16384 /* Check the paths ".", ".." for staleness */ -#define FS_ODD_RENAME 32768 /* Temporary stuff; will go away as soon - * as nfs_rename() will be cleaned up - */ +#define FS_RENAME_DOES_D_MOVE 32768 /* FS will handle d_move() + * during rename() internally. + */ + /* * These are the fs-independent mount-flags: up to 32 flags are supported */