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authorTrond Myklebust <Trond.Myklebust@netapp.com>2007-06-08 14:14:46 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2007-07-10 23:40:33 -0400
commit62e1761ceff5dbb78c4b4b9486d8ca9fed11b660 (patch)
tree6d8a31738beec2340ccfe662b352f5aa9b5659f8 /net
parent34f308960818e514fadd9365cb5b14cca319320b (diff)
SUNRPC: Clean up rpc_pipefs.
Add a dentry_ops with a d_delete() method in order to ensure that dentries are removed as soon as the last reference is gone. Clean up rpc_depopulate() so that it only removes files that were created via rpc_populate(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/rpc_pipe.c59
1 files changed, 32 insertions, 27 deletions
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index ebcb8053836..e5fd796e897 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -448,6 +448,15 @@ void rpc_put_mount(void)
simple_release_fs(&rpc_mount, &rpc_mount_count);
}
+static int rpc_delete_dentry(struct dentry *dentry)
+{
+ return 1;
+}
+
+static struct dentry_operations rpc_dentry_operations = {
+ .d_delete = rpc_delete_dentry,
+};
+
static int
rpc_lookup_parent(char *path, struct nameidata *nd)
{
@@ -506,7 +515,7 @@ rpc_get_inode(struct super_block *sb, int mode)
* FIXME: This probably has races.
*/
static void
-rpc_depopulate(struct dentry *parent)
+rpc_depopulate(struct dentry *parent, int start, int eof)
{
struct inode *dir = parent->d_inode;
struct list_head *pos, *next;
@@ -518,6 +527,10 @@ repeat:
spin_lock(&dcache_lock);
list_for_each_safe(pos, next, &parent->d_subdirs) {
dentry = list_entry(pos, struct dentry, d_u.d_child);
+ if (!dentry->d_inode ||
+ dentry->d_inode->i_ino < start ||
+ dentry->d_inode->i_ino >= eof)
+ continue;
spin_lock(&dentry->d_lock);
if (!d_unhashed(dentry)) {
dget_locked(dentry);
@@ -533,11 +546,11 @@ repeat:
if (n) {
do {
dentry = dvec[--n];
- if (dentry->d_inode) {
- rpc_close_pipes(dentry->d_inode);
+ if (S_ISREG(dentry->d_inode->i_mode))
simple_unlink(dir, dentry);
- }
- inode_dir_notify(dir, DN_DELETE);
+ else if (S_ISDIR(dentry->d_inode->i_mode))
+ simple_rmdir(dir, dentry);
+ d_delete(dentry);
dput(dentry);
} while (n);
goto repeat;
@@ -560,6 +573,7 @@ rpc_populate(struct dentry *parent,
dentry = d_alloc_name(parent, files[i].name);
if (!dentry)
goto out_bad;
+ dentry->d_op = &rpc_dentry_operations;
mode = files[i].mode;
inode = rpc_get_inode(dir->i_sb, mode);
if (!inode) {
@@ -607,17 +621,10 @@ static int
__rpc_rmdir(struct inode *dir, struct dentry *dentry)
{
int error;
-
- shrink_dcache_parent(dentry);
- if (d_unhashed(dentry))
- return 0;
- if ((error = simple_rmdir(dir, dentry)) != 0)
- return error;
- if (!error) {
- inode_dir_notify(dir, DN_DELETE);
- d_drop(dentry);
- }
- return 0;
+ error = simple_rmdir(dir, dentry);
+ if (!error)
+ d_delete(dentry);
+ return error;
}
static struct dentry *
@@ -630,7 +637,9 @@ rpc_lookup_create(struct dentry *parent, const char *name, int len, int exclusiv
dentry = lookup_one_len(name, parent, len);
if (IS_ERR(dentry))
goto out_err;
- if (dentry->d_inode && exclusive) {
+ if (!dentry->d_inode)
+ dentry->d_op = &rpc_dentry_operations;
+ else if (exclusive) {
dput(dentry);
dentry = ERR_PTR(-EEXIST);
goto out_err;
@@ -681,7 +690,7 @@ out:
rpc_release_path(&nd);
return dentry;
err_depopulate:
- rpc_depopulate(dentry);
+ rpc_depopulate(dentry, RPCAUTH_info, RPCAUTH_EOF);
__rpc_rmdir(dir, dentry);
err_dput:
dput(dentry);
@@ -701,7 +710,7 @@ rpc_rmdir(struct dentry *dentry)
parent = dget_parent(dentry);
dir = parent->d_inode;
mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT);
- rpc_depopulate(dentry);
+ rpc_depopulate(dentry, RPCAUTH_info, RPCAUTH_EOF);
error = __rpc_rmdir(dir, dentry);
dput(dentry);
mutex_unlock(&dir->i_mutex);
@@ -764,14 +773,10 @@ rpc_unlink(struct dentry *dentry)
parent = dget_parent(dentry);
dir = parent->d_inode;
mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT);
- if (!d_unhashed(dentry)) {
- d_drop(dentry);
- if (dentry->d_inode) {
- rpc_close_pipes(dentry->d_inode);
- error = simple_unlink(dir, dentry);
- }
- inode_dir_notify(dir, DN_DELETE);
- }
+ rpc_close_pipes(dentry->d_inode);
+ error = simple_unlink(dir, dentry);
+ if (!error)
+ d_delete(dentry);
dput(dentry);
mutex_unlock(&dir->i_mutex);
dput(parent);