Merge branch 'master' of /home/trondmy/kernel/linux-2.6/

[sfrench/cifs-2.6.git] / fs / nfs / dir.c

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 4133ef5264e53c738c1c312da874bea25e3de1bf..92d8ec859e224170a20cc24c728b3af582b4c60e 100644 (file)
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -65,7 +65,7 @@ const struct file_operations nfs_dir_operations = {
        .fsync          = nfs_fsync_dir,
 };
 
-struct inode_operations nfs_dir_inode_operations = {
+const struct inode_operations nfs_dir_inode_operations = {
        .create         = nfs_create,
        .lookup         = nfs_lookup,
        .link           = nfs_link,
@@ -81,7 +81,7 @@ struct inode_operations nfs_dir_inode_operations = {
 };
 
 #ifdef CONFIG_NFS_V3
-struct inode_operations nfs3_dir_inode_operations = {
+const struct inode_operations nfs3_dir_inode_operations = {
        .create         = nfs_create,
        .lookup         = nfs_lookup,
        .link           = nfs_link,
@@ -104,7 +104,7 @@ struct inode_operations nfs3_dir_inode_operations = {
 #ifdef CONFIG_NFS_V4
 
 static struct dentry *nfs_atomic_lookup(struct inode *, struct dentry *, struct nameidata *);
-struct inode_operations nfs4_dir_inode_operations = {
+const struct inode_operations nfs4_dir_inode_operations = {
        .create         = nfs_create,
        .lookup         = nfs_atomic_lookup,
        .link           = nfs_link,
@@ -172,7 +172,7 @@ static
 int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page *page)
 {
        struct file     *file = desc->file;
-       struct inode    *inode = file->f_dentry->d_inode;
+       struct inode    *inode = file->f_path.dentry->d_inode;
        struct rpc_cred *cred = nfs_file_cred(file);
        unsigned long   timestamp;
        int             error;
@@ -183,7 +183,7 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page *page)
 
  again:
        timestamp = jiffies;
-       error = NFS_PROTO(inode)->readdir(file->f_dentry, cred, desc->entry->cookie, page,
+       error = NFS_PROTO(inode)->readdir(file->f_path.dentry, cred, desc->entry->cookie, page,
                                          NFS_SERVER(inode)->dtsize, desc->plus);
        if (error < 0) {
                /* We requested READDIRPLUS, but the server doesn't grok it */
@@ -308,7 +308,7 @@ int find_dirent_index(nfs_readdir_descriptor_t *desc)
 static inline
 int find_dirent_page(nfs_readdir_descriptor_t *desc)
 {
-       struct inode    *inode = desc->file->f_dentry->d_inode;
+       struct inode    *inode = desc->file->f_path.dentry->d_inode;
        struct page     *page;
        int             status;
 
@@ -464,7 +464,7 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent,
                     filldir_t filldir)
 {
        struct file     *file = desc->file;
-       struct inode    *inode = file->f_dentry->d_inode;
+       struct inode    *inode = file->f_path.dentry->d_inode;
        struct rpc_cred *cred = nfs_file_cred(file);
        struct page     *page = NULL;
        int             status;
@@ -477,7 +477,7 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent,
                status = -ENOMEM;
                goto out;
        }
-       desc->error = NFS_PROTO(inode)->readdir(file->f_dentry, cred, *desc->dir_cookie,
+       desc->error = NFS_PROTO(inode)->readdir(file->f_path.dentry, cred, *desc->dir_cookie,
                                                page,
                                                NFS_SERVER(inode)->dtsize,
                                                desc->plus);
@@ -516,7 +516,7 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent,
  */
 static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
 {
-       struct dentry   *dentry = filp->f_dentry;
+       struct dentry   *dentry = filp->f_path.dentry;
        struct inode    *inode = dentry->d_inode;
        nfs_readdir_descriptor_t my_desc,
                        *desc = &my_desc;
@@ -532,7 +532,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
 
        lock_kernel();
 
-       res = nfs_revalidate_mapping(inode, filp->f_mapping);
+       res = nfs_revalidate_mapping_nolock(inode, filp->f_mapping);
        if (res < 0) {
                unlock_kernel();
                return res;
@@ -599,7 +599,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
 
 loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin)
 {
-       mutex_lock(&filp->f_dentry->d_inode->i_mutex);
+       mutex_lock(&filp->f_path.dentry->d_inode->i_mutex);
        switch (origin) {
                case 1:
                        offset += filp->f_pos;
@@ -615,7 +615,7 @@ loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin)
                ((struct nfs_open_context *)filp->private_data)->dir_cookie = 0;
        }
 out:
-       mutex_unlock(&filp->f_dentry->d_inode->i_mutex);
+       mutex_unlock(&filp->f_path.dentry->d_inode->i_mutex);
        return offset;
 }
 
@@ -637,7 +637,7 @@ int nfs_fsync_dir(struct file *filp, struct dentry *dentry, int datasync)
  * In the case it has, we assume that the dentries are untrustworthy
  * and may need to be looked up again.
  */
-static inline int nfs_check_verifier(struct inode *dir, struct dentry *dentry)
+static int nfs_check_verifier(struct inode *dir, struct dentry *dentry)
 {
        if (IS_ROOT(dentry))
                return 1;
@@ -652,6 +652,12 @@ static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf)
        dentry->d_fsdata = (void *)verf;
 }
 
+static void nfs_refresh_verifier(struct dentry * dentry, unsigned long verf)
+{
+       if (time_after(verf, (unsigned long)dentry->d_fsdata))
+               nfs_set_verifier(dentry, verf);
+}
+
 /*
  * Whenever an NFS operation succeeds, we know that the dentry
  * is valid, so we update the revalidation timestamp.
@@ -785,7 +791,7 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd)
                goto out_bad;
 
        nfs_renew_times(dentry);
-       nfs_set_verifier(dentry, verifier);
+       nfs_refresh_verifier(dentry, verifier);
  out_valid:
        unlock_kernel();
        dput(parent);
@@ -935,8 +941,17 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
 
 no_entry:
        res = d_materialise_unique(dentry, inode);
-       if (res != NULL)
+       if (res != NULL) {
+               struct dentry *parent;
+               if (IS_ERR(res))
+                       goto out_unlock;
+               /* Was a directory renamed! */
+               parent = dget_parent(res);
+               if (!IS_ROOT(parent))
+                       nfs_mark_for_revalidate(parent->d_inode);
+               dput(parent);
                dentry = res;
+       }
        nfs_renew_times(dentry);
        nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
 out_unlock:
@@ -1076,7 +1091,7 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd)
        verifier = nfs_save_change_attribute(dir);
        ret = nfs4_open_revalidate(dir, dentry, openflags, nd);
        if (!ret)
-               nfs_set_verifier(dentry, verifier);
+               nfs_refresh_verifier(dentry, verifier);
        unlock_kernel();
 out:
        dput(parent);
@@ -1093,7 +1108,7 @@ no_open:
 
 static struct dentry *nfs_readdir_lookup(nfs_readdir_descriptor_t *desc)
 {
-       struct dentry *parent = desc->file->f_dentry;
+       struct dentry *parent = desc->file->f_path.dentry;
        struct inode *dir = parent->d_inode;
        struct nfs_entry *entry = desc->entry;
        struct dentry *dentry, *alias;
@@ -1114,8 +1129,21 @@ static struct dentry *nfs_readdir_lookup(nfs_readdir_descriptor_t *desc)
        }
        name.hash = full_name_hash(name.name, name.len);
        dentry = d_lookup(parent, &name);
-       if (dentry != NULL)
-               return dentry;
+       if (dentry != NULL) {
+               /* Is this a positive dentry that matches the readdir info? */
+               if (dentry->d_inode != NULL &&
+                               (NFS_FILEID(dentry->d_inode) == entry->ino ||
+                               d_mountpoint(dentry))) {
+                       if (!desc->plus || entry->fh->size == 0)
+                               return dentry;
+                       if (nfs_compare_fh(NFS_FH(dentry->d_inode),
+                                               entry->fh) == 0)
+                               goto out_renew;
+               }
+               /* No, so d_drop to allow one to be created */
+               d_drop(dentry);
+               dput(dentry);
+       }
        if (!desc->plus || !(entry->fattr->valid & NFS_ATTR_FATTR))
                return NULL;
        /* Note: caller is already holding the dir->i_mutex! */
@@ -1132,12 +1160,18 @@ static struct dentry *nfs_readdir_lookup(nfs_readdir_descriptor_t *desc)
        alias = d_materialise_unique(dentry, inode);
        if (alias != NULL) {
                dput(dentry);
+               if (IS_ERR(alias))
+                       return NULL;
                dentry = alias;
        }
 
        nfs_renew_times(dentry);
        nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
        return dentry;
+out_renew:
+       nfs_renew_times(dentry);
+       nfs_refresh_verifier(dentry, nfs_save_change_attribute(dir));
+       return dentry;
 }
 
 /*
@@ -1432,6 +1466,8 @@ static int nfs_unlink(struct inode *dir, struct dentry *dentry)
        if (atomic_read(&dentry->d_count) > 1) {
                spin_unlock(&dentry->d_lock);
                spin_unlock(&dcache_lock);
+               /* Start asynchronous writeout of the inode */
+               write_inode_now(dentry->d_inode, 0);
                error = nfs_sillyrename(dir, dentry);
                unlock_kernel();
                return error;
@@ -1673,7 +1709,7 @@ out:
        if (!error) {
                d_move(old_dentry, new_dentry);
                nfs_renew_times(new_dentry);
-               nfs_set_verifier(new_dentry, nfs_save_change_attribute(new_dir));
+               nfs_refresh_verifier(new_dentry, nfs_save_change_attribute(new_dir));
        }
 
        /* new dentry created? */