mirror of
https://github.com/joel16/android_kernel_sony_msm8994_rework.git
synced 2024-12-27 22:46:57 +00:00
nfsd: open a file descriptor for fsync in nfs4 recovery
Instead of just looking up a path use do_filp_open to get us a file structure for the nfs4 recovery directory. This allows us to get rid of the last non-standard vfs_fsync caller with a NULL file pointer. [AV: should be using fput(), not filp_close()] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig
Al Viro
parent
2e147f1ef7
commit
e970a573ce
@ -44,8 +44,7 @@
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#define NFSDDBG_FACILITY NFSDDBG_PROC
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/* Globals */
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static struct path rec_dir;
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static int rec_dir_init = 0;
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static struct file *rec_file;
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static int
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nfs4_save_creds(const struct cred **original_creds)
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@ -117,33 +116,28 @@ out_no_tfm:
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return status;
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}
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static void
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nfsd4_sync_rec_dir(void)
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{
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vfs_fsync(NULL, rec_dir.dentry, 0);
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}
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int
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nfsd4_create_clid_dir(struct nfs4_client *clp)
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{
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const struct cred *original_cred;
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char *dname = clp->cl_recdir;
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struct dentry *dentry;
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struct dentry *dir, *dentry;
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int status;
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dprintk("NFSD: nfsd4_create_clid_dir for \"%s\"\n", dname);
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if (!rec_dir_init || clp->cl_firststate)
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if (!rec_file || clp->cl_firststate)
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return 0;
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status = nfs4_save_creds(&original_cred);
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if (status < 0)
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return status;
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dir = rec_file->f_path.dentry;
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/* lock the parent */
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mutex_lock(&rec_dir.dentry->d_inode->i_mutex);
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mutex_lock(&dir->d_inode->i_mutex);
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dentry = lookup_one_len(dname, rec_dir.dentry, HEXDIR_LEN-1);
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dentry = lookup_one_len(dname, dir, HEXDIR_LEN-1);
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if (IS_ERR(dentry)) {
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status = PTR_ERR(dentry);
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goto out_unlock;
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@ -153,18 +147,18 @@ nfsd4_create_clid_dir(struct nfs4_client *clp)
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dprintk("NFSD: nfsd4_create_clid_dir: DIRECTORY EXISTS\n");
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goto out_put;
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}
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status = mnt_want_write(rec_dir.mnt);
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status = mnt_want_write(rec_file->f_path.mnt);
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if (status)
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goto out_put;
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status = vfs_mkdir(rec_dir.dentry->d_inode, dentry, S_IRWXU);
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mnt_drop_write(rec_dir.mnt);
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status = vfs_mkdir(dir->d_inode, dentry, S_IRWXU);
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mnt_drop_write(rec_file->f_path.mnt);
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out_put:
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dput(dentry);
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out_unlock:
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mutex_unlock(&rec_dir.dentry->d_inode->i_mutex);
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mutex_unlock(&dir->d_inode->i_mutex);
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if (status == 0) {
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clp->cl_firststate = 1;
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nfsd4_sync_rec_dir();
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vfs_fsync(rec_file, rec_file->f_path.dentry, 0);
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}
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nfs4_reset_creds(original_cred);
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dprintk("NFSD: nfsd4_create_clid_dir returns %d\n", status);
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@ -206,14 +200,14 @@ nfsd4_list_rec_dir(struct dentry *dir, recdir_func *f)
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struct dentry *dentry;
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int status;
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if (!rec_dir_init)
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if (!rec_file)
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return 0;
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status = nfs4_save_creds(&original_cred);
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if (status < 0)
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return status;
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filp = dentry_open(dget(dir), mntget(rec_dir.mnt), O_RDONLY,
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filp = dentry_open(dget(dir), mntget(rec_file->f_path.mnt), O_RDONLY,
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current_cred());
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status = PTR_ERR(filp);
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if (IS_ERR(filp))
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@ -250,13 +244,14 @@ out:
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static int
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nfsd4_unlink_clid_dir(char *name, int namlen)
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{
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struct dentry *dentry;
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struct dentry *dir, *dentry;
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int status;
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dprintk("NFSD: nfsd4_unlink_clid_dir. name %.*s\n", namlen, name);
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mutex_lock_nested(&rec_dir.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
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dentry = lookup_one_len(name, rec_dir.dentry, namlen);
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dir = rec_file->f_path.dentry;
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mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
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dentry = lookup_one_len(name, dir, namlen);
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if (IS_ERR(dentry)) {
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status = PTR_ERR(dentry);
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goto out_unlock;
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@ -264,11 +259,11 @@ nfsd4_unlink_clid_dir(char *name, int namlen)
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status = -ENOENT;
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if (!dentry->d_inode)
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goto out;
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status = vfs_rmdir(rec_dir.dentry->d_inode, dentry);
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status = vfs_rmdir(dir->d_inode, dentry);
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out:
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dput(dentry);
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out_unlock:
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mutex_unlock(&rec_dir.dentry->d_inode->i_mutex);
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mutex_unlock(&dir->d_inode->i_mutex);
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return status;
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}
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@ -278,10 +273,10 @@ nfsd4_remove_clid_dir(struct nfs4_client *clp)
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const struct cred *original_cred;
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int status;
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if (!rec_dir_init || !clp->cl_firststate)
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if (!rec_file || !clp->cl_firststate)
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return;
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status = mnt_want_write(rec_dir.mnt);
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status = mnt_want_write(rec_file->f_path.mnt);
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if (status)
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goto out;
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clp->cl_firststate = 0;
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@ -293,8 +288,8 @@ nfsd4_remove_clid_dir(struct nfs4_client *clp)
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status = nfsd4_unlink_clid_dir(clp->cl_recdir, HEXDIR_LEN-1);
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nfs4_reset_creds(original_cred);
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if (status == 0)
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nfsd4_sync_rec_dir();
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mnt_drop_write(rec_dir.mnt);
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vfs_fsync(rec_file, rec_file->f_path.dentry, 0);
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mnt_drop_write(rec_file->f_path.mnt);
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out:
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if (status)
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printk("NFSD: Failed to remove expired client state directory"
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@ -323,19 +318,19 @@ void
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nfsd4_recdir_purge_old(void) {
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int status;
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if (!rec_dir_init)
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if (!rec_file)
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return;
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status = mnt_want_write(rec_dir.mnt);
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status = mnt_want_write(rec_file->f_path.mnt);
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if (status)
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goto out;
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status = nfsd4_list_rec_dir(rec_dir.dentry, purge_old);
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status = nfsd4_list_rec_dir(rec_file->f_path.dentry, purge_old);
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if (status == 0)
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nfsd4_sync_rec_dir();
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mnt_drop_write(rec_dir.mnt);
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vfs_fsync(rec_file, rec_file->f_path.dentry, 0);
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mnt_drop_write(rec_file->f_path.mnt);
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out:
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if (status)
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printk("nfsd4: failed to purge old clients from recovery"
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" directory %s\n", rec_dir.dentry->d_name.name);
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" directory %s\n", rec_file->f_path.dentry->d_name.name);
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}
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static int
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@ -355,10 +350,13 @@ int
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nfsd4_recdir_load(void) {
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int status;
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status = nfsd4_list_rec_dir(rec_dir.dentry, load_recdir);
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if (!rec_file)
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return 0;
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status = nfsd4_list_rec_dir(rec_file->f_path.dentry, load_recdir);
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if (status)
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printk("nfsd4: failed loading clients from recovery"
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" directory %s\n", rec_dir.dentry->d_name.name);
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" directory %s\n", rec_file->f_path.dentry->d_name.name);
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return status;
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}
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@ -375,7 +373,7 @@ nfsd4_init_recdir(char *rec_dirname)
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printk("NFSD: Using %s as the NFSv4 state recovery directory\n",
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rec_dirname);
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BUG_ON(rec_dir_init);
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BUG_ON(rec_file);
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status = nfs4_save_creds(&original_cred);
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if (status < 0) {
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@ -385,22 +383,21 @@ nfsd4_init_recdir(char *rec_dirname)
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return;
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}
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status = kern_path(rec_dirname, LOOKUP_FOLLOW | LOOKUP_DIRECTORY,
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&rec_dir);
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if (status)
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rec_file = filp_open(rec_dirname, O_RDONLY | O_DIRECTORY, 0);
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if (IS_ERR(rec_file)) {
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printk("NFSD: unable to find recovery directory %s\n",
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rec_dirname);
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rec_file = NULL;
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}
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if (!status)
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rec_dir_init = 1;
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nfs4_reset_creds(original_cred);
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}
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void
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nfsd4_shutdown_recdir(void)
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{
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if (!rec_dir_init)
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if (!rec_file)
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return;
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rec_dir_init = 0;
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path_put(&rec_dir);
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fput(rec_file);
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rec_file = NULL;
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}
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