mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-24 12:44:11 +08:00
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 @@
|
||||
#define NFSDDBG_FACILITY NFSDDBG_PROC
|
||||
|
||||
/* Globals */
|
||||
static struct path rec_dir;
|
||||
static int rec_dir_init = 0;
|
||||
static struct file *rec_file;
|
||||
|
||||
static int
|
||||
nfs4_save_creds(const struct cred **original_creds)
|
||||
@ -117,33 +116,28 @@ out_no_tfm:
|
||||
return status;
|
||||
}
|
||||
|
||||
static void
|
||||
nfsd4_sync_rec_dir(void)
|
||||
{
|
||||
vfs_fsync(NULL, rec_dir.dentry, 0);
|
||||
}
|
||||
|
||||
int
|
||||
nfsd4_create_clid_dir(struct nfs4_client *clp)
|
||||
{
|
||||
const struct cred *original_cred;
|
||||
char *dname = clp->cl_recdir;
|
||||
struct dentry *dentry;
|
||||
struct dentry *dir, *dentry;
|
||||
int status;
|
||||
|
||||
dprintk("NFSD: nfsd4_create_clid_dir for \"%s\"\n", dname);
|
||||
|
||||
if (!rec_dir_init || clp->cl_firststate)
|
||||
if (!rec_file || clp->cl_firststate)
|
||||
return 0;
|
||||
|
||||
status = nfs4_save_creds(&original_cred);
|
||||
if (status < 0)
|
||||
return status;
|
||||
|
||||
dir = rec_file->f_path.dentry;
|
||||
/* lock the parent */
|
||||
mutex_lock(&rec_dir.dentry->d_inode->i_mutex);
|
||||
mutex_lock(&dir->d_inode->i_mutex);
|
||||
|
||||
dentry = lookup_one_len(dname, rec_dir.dentry, HEXDIR_LEN-1);
|
||||
dentry = lookup_one_len(dname, dir, HEXDIR_LEN-1);
|
||||
if (IS_ERR(dentry)) {
|
||||
status = PTR_ERR(dentry);
|
||||
goto out_unlock;
|
||||
@ -153,18 +147,18 @@ nfsd4_create_clid_dir(struct nfs4_client *clp)
|
||||
dprintk("NFSD: nfsd4_create_clid_dir: DIRECTORY EXISTS\n");
|
||||
goto out_put;
|
||||
}
|
||||
status = mnt_want_write(rec_dir.mnt);
|
||||
status = mnt_want_write(rec_file->f_path.mnt);
|
||||
if (status)
|
||||
goto out_put;
|
||||
status = vfs_mkdir(rec_dir.dentry->d_inode, dentry, S_IRWXU);
|
||||
mnt_drop_write(rec_dir.mnt);
|
||||
status = vfs_mkdir(dir->d_inode, dentry, S_IRWXU);
|
||||
mnt_drop_write(rec_file->f_path.mnt);
|
||||
out_put:
|
||||
dput(dentry);
|
||||
out_unlock:
|
||||
mutex_unlock(&rec_dir.dentry->d_inode->i_mutex);
|
||||
mutex_unlock(&dir->d_inode->i_mutex);
|
||||
if (status == 0) {
|
||||
clp->cl_firststate = 1;
|
||||
nfsd4_sync_rec_dir();
|
||||
vfs_fsync(rec_file, rec_file->f_path.dentry, 0);
|
||||
}
|
||||
nfs4_reset_creds(original_cred);
|
||||
dprintk("NFSD: nfsd4_create_clid_dir returns %d\n", status);
|
||||
@ -206,14 +200,14 @@ nfsd4_list_rec_dir(struct dentry *dir, recdir_func *f)
|
||||
struct dentry *dentry;
|
||||
int status;
|
||||
|
||||
if (!rec_dir_init)
|
||||
if (!rec_file)
|
||||
return 0;
|
||||
|
||||
status = nfs4_save_creds(&original_cred);
|
||||
if (status < 0)
|
||||
return status;
|
||||
|
||||
filp = dentry_open(dget(dir), mntget(rec_dir.mnt), O_RDONLY,
|
||||
filp = dentry_open(dget(dir), mntget(rec_file->f_path.mnt), O_RDONLY,
|
||||
current_cred());
|
||||
status = PTR_ERR(filp);
|
||||
if (IS_ERR(filp))
|
||||
@ -250,13 +244,14 @@ out:
|
||||
static int
|
||||
nfsd4_unlink_clid_dir(char *name, int namlen)
|
||||
{
|
||||
struct dentry *dentry;
|
||||
struct dentry *dir, *dentry;
|
||||
int status;
|
||||
|
||||
dprintk("NFSD: nfsd4_unlink_clid_dir. name %.*s\n", namlen, name);
|
||||
|
||||
mutex_lock_nested(&rec_dir.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
|
||||
dentry = lookup_one_len(name, rec_dir.dentry, namlen);
|
||||
dir = rec_file->f_path.dentry;
|
||||
mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
|
||||
dentry = lookup_one_len(name, dir, namlen);
|
||||
if (IS_ERR(dentry)) {
|
||||
status = PTR_ERR(dentry);
|
||||
goto out_unlock;
|
||||
@ -264,11 +259,11 @@ nfsd4_unlink_clid_dir(char *name, int namlen)
|
||||
status = -ENOENT;
|
||||
if (!dentry->d_inode)
|
||||
goto out;
|
||||
status = vfs_rmdir(rec_dir.dentry->d_inode, dentry);
|
||||
status = vfs_rmdir(dir->d_inode, dentry);
|
||||
out:
|
||||
dput(dentry);
|
||||
out_unlock:
|
||||
mutex_unlock(&rec_dir.dentry->d_inode->i_mutex);
|
||||
mutex_unlock(&dir->d_inode->i_mutex);
|
||||
return status;
|
||||
}
|
||||
|
||||
@ -278,10 +273,10 @@ nfsd4_remove_clid_dir(struct nfs4_client *clp)
|
||||
const struct cred *original_cred;
|
||||
int status;
|
||||
|
||||
if (!rec_dir_init || !clp->cl_firststate)
|
||||
if (!rec_file || !clp->cl_firststate)
|
||||
return;
|
||||
|
||||
status = mnt_want_write(rec_dir.mnt);
|
||||
status = mnt_want_write(rec_file->f_path.mnt);
|
||||
if (status)
|
||||
goto out;
|
||||
clp->cl_firststate = 0;
|
||||
@ -293,8 +288,8 @@ nfsd4_remove_clid_dir(struct nfs4_client *clp)
|
||||
status = nfsd4_unlink_clid_dir(clp->cl_recdir, HEXDIR_LEN-1);
|
||||
nfs4_reset_creds(original_cred);
|
||||
if (status == 0)
|
||||
nfsd4_sync_rec_dir();
|
||||
mnt_drop_write(rec_dir.mnt);
|
||||
vfs_fsync(rec_file, rec_file->f_path.dentry, 0);
|
||||
mnt_drop_write(rec_file->f_path.mnt);
|
||||
out:
|
||||
if (status)
|
||||
printk("NFSD: Failed to remove expired client state directory"
|
||||
@ -323,19 +318,19 @@ void
|
||||
nfsd4_recdir_purge_old(void) {
|
||||
int status;
|
||||
|
||||
if (!rec_dir_init)
|
||||
if (!rec_file)
|
||||
return;
|
||||
status = mnt_want_write(rec_dir.mnt);
|
||||
status = mnt_want_write(rec_file->f_path.mnt);
|
||||
if (status)
|
||||
goto out;
|
||||
status = nfsd4_list_rec_dir(rec_dir.dentry, purge_old);
|
||||
status = nfsd4_list_rec_dir(rec_file->f_path.dentry, purge_old);
|
||||
if (status == 0)
|
||||
nfsd4_sync_rec_dir();
|
||||
mnt_drop_write(rec_dir.mnt);
|
||||
vfs_fsync(rec_file, rec_file->f_path.dentry, 0);
|
||||
mnt_drop_write(rec_file->f_path.mnt);
|
||||
out:
|
||||
if (status)
|
||||
printk("nfsd4: failed to purge old clients from recovery"
|
||||
" directory %s\n", rec_dir.dentry->d_name.name);
|
||||
" directory %s\n", rec_file->f_path.dentry->d_name.name);
|
||||
}
|
||||
|
||||
static int
|
||||
@ -355,10 +350,13 @@ int
|
||||
nfsd4_recdir_load(void) {
|
||||
int status;
|
||||
|
||||
status = nfsd4_list_rec_dir(rec_dir.dentry, load_recdir);
|
||||
if (!rec_file)
|
||||
return 0;
|
||||
|
||||
status = nfsd4_list_rec_dir(rec_file->f_path.dentry, load_recdir);
|
||||
if (status)
|
||||
printk("nfsd4: failed loading clients from recovery"
|
||||
" directory %s\n", rec_dir.dentry->d_name.name);
|
||||
" directory %s\n", rec_file->f_path.dentry->d_name.name);
|
||||
return status;
|
||||
}
|
||||
|
||||
@ -375,7 +373,7 @@ nfsd4_init_recdir(char *rec_dirname)
|
||||
printk("NFSD: Using %s as the NFSv4 state recovery directory\n",
|
||||
rec_dirname);
|
||||
|
||||
BUG_ON(rec_dir_init);
|
||||
BUG_ON(rec_file);
|
||||
|
||||
status = nfs4_save_creds(&original_cred);
|
||||
if (status < 0) {
|
||||
@ -385,22 +383,21 @@ nfsd4_init_recdir(char *rec_dirname)
|
||||
return;
|
||||
}
|
||||
|
||||
status = kern_path(rec_dirname, LOOKUP_FOLLOW | LOOKUP_DIRECTORY,
|
||||
&rec_dir);
|
||||
if (status)
|
||||
rec_file = filp_open(rec_dirname, O_RDONLY | O_DIRECTORY, 0);
|
||||
if (IS_ERR(rec_file)) {
|
||||
printk("NFSD: unable to find recovery directory %s\n",
|
||||
rec_dirname);
|
||||
rec_file = NULL;
|
||||
}
|
||||
|
||||
if (!status)
|
||||
rec_dir_init = 1;
|
||||
nfs4_reset_creds(original_cred);
|
||||
}
|
||||
|
||||
void
|
||||
nfsd4_shutdown_recdir(void)
|
||||
{
|
||||
if (!rec_dir_init)
|
||||
if (!rec_file)
|
||||
return;
|
||||
rec_dir_init = 0;
|
||||
path_put(&rec_dir);
|
||||
fput(rec_file);
|
||||
rec_file = NULL;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user