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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 2010-03-22 17:32:14 +01:00 committed by Al Viro
parent 2e147f1ef7
commit e970a573ce
1 changed files with 42 additions and 45 deletions
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87
fs/nfsd/nfs4recover.c
View File

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