We'll need the path to implement the flags field for statvfs support.
We do have it available in all callers except:
- ecryptfs_statfs. This one doesn't actually need vfs_statfs but just
needs to do a caller to the lower filesystem statfs method.
- sys_ustat. Add a non-exported statfs_by_dentry helper for it which
doesn't won't be able to fill out the flags field later on.
In addition rename the helpers for statfs vs fstatfs to do_*statfs instead
of the misleading vfs prefix.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
}
static int
-do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer,
+do_osf_statfs(struct path *path, struct osf_statfs __user *buffer,
unsigned long bufsiz)
{
struct kstatfs linux_stat;
- int error = vfs_statfs(dentry, &linux_stat);
+ int error = vfs_statfs(path, &linux_stat);
if (!error)
error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
return error;
retval = user_path(pathname, &path);
if (!retval) {
- retval = do_osf_statfs(path.dentry, buffer, bufsiz);
+ retval = do_osf_statfs(&path buffer, bufsiz);
path_put(&path);
}
return retval;
retval = -EBADF;
file = fget(fd);
if (file) {
- retval = do_osf_statfs(file->f_path.dentry, buffer, bufsiz);
+ retval = do_osf_statfs(&file->f_path, buffer, bufsiz);
fput(file);
}
return retval;
s = user_get_super(dev);
if (s == NULL)
goto out;
- err = vfs_statfs(s->s_root, &sbuf);
+ err = statfs_by_dentry(s->s_root, &sbuf);
drop_super(s);
if (err)
goto out;
int16_t f_pad;
};
-static int vfs_statfs_hpux(struct dentry *dentry, struct hpux_statfs *buf)
+static int do_statfs_hpux(struct path *path, struct hpux_statfs *buf)
{
struct kstatfs st;
int retval;
- retval = vfs_statfs(dentry, &st);
+ retval = vfs_statfs(path, &st);
if (retval)
return retval;
error = user_path(pathname, &path);
if (!error) {
struct hpux_statfs tmp;
- error = vfs_statfs_hpux(path.dentry, &tmp);
+ error = do_statfs_hpux(&path, &tmp);
if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
error = -EFAULT;
path_put(&path);
file = fget(fd);
if (!file)
goto out;
- error = vfs_statfs_hpux(file->f_path.dentry, &tmp);
+ error = do_statfs_hpux(&file->f_path, &tmp);
if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
error = -EFAULT;
fput(file);
goto error_unsupported;
/* get the cache size and blocksize */
- ret = vfs_statfs(root, &stats);
+ ret = vfs_statfs(&path, &stats);
if (ret < 0)
goto error_unsupported;
unsigned fnr, unsigned bnr)
{
struct kstatfs stats;
+ struct path path = {
+ .mnt = cache->mnt,
+ .dentry = cache->mnt->mnt_root,
+ };
int ret;
//_enter("{%llu,%llu,%llu,%llu,%llu,%llu},%u,%u",
/* find out how many pages of blockdev are available */
memset(&stats, 0, sizeof(stats));
- ret = vfs_statfs(cache->mnt->mnt_root, &stats);
+ ret = vfs_statfs(&path, &stats);
if (ret < 0) {
if (ret == -EIO)
cachefiles_io_error(cache, "statfs failed");
error = user_path(pathname, &path);
if (!error) {
struct kstatfs tmp;
- error = vfs_statfs(path.dentry, &tmp);
+ error = vfs_statfs(&path, &tmp);
if (!error)
error = put_compat_statfs(buf, &tmp);
path_put(&path);
file = fget(fd);
if (!file)
goto out;
- error = vfs_statfs(file->f_path.dentry, &tmp);
+ error = vfs_statfs(&file->f_path, &tmp);
if (!error)
error = put_compat_statfs(buf, &tmp);
fput(file);
error = user_path(pathname, &path);
if (!error) {
struct kstatfs tmp;
- error = vfs_statfs(path.dentry, &tmp);
+ error = vfs_statfs(&path, &tmp);
if (!error)
error = put_compat_statfs64(buf, &tmp);
path_put(&path);
file = fget(fd);
if (!file)
goto out;
- error = vfs_statfs(file->f_path.dentry, &tmp);
+ error = vfs_statfs(&file->f_path, &tmp);
if (!error)
error = put_compat_statfs64(buf, &tmp);
fput(file);
sb = user_get_super(new_decode_dev(dev));
if (!sb)
return -EINVAL;
- err = vfs_statfs(sb->s_root, &sbuf);
+ err = statfs_by_dentry(sb->s_root, &sbuf);
drop_super(sb);
if (err)
return err;
*/
static int ecryptfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
- return vfs_statfs(ecryptfs_dentry_to_lower(dentry), buf);
+ struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
+
+ if (!lower_dentry->d_sb->s_op->statfs)
+ return -ENOSYS;
+ return lower_dentry->d_sb->s_op->statfs(lower_dentry, buf);
}
/**
struct nfs4_acl *acl = NULL;
struct nfsd4_compoundres *resp = rqstp->rq_resp;
u32 minorversion = resp->cstate.minorversion;
+ struct path path = {
+ .mnt = exp->ex_path.mnt,
+ .dentry = dentry,
+ };
BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
FATTR4_WORD0_MAXNAME)) ||
(bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
FATTR4_WORD1_SPACE_TOTAL))) {
- err = vfs_statfs(dentry, &statfs);
+ err = vfs_statfs(&path, &statfs);
if (err)
goto out_nfserr;
}
__be32
nfsd_statfs(struct svc_rqst *rqstp, struct svc_fh *fhp, struct kstatfs *stat, int access)
{
- __be32 err = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP | access);
- if (!err && vfs_statfs(fhp->fh_dentry,stat))
+ struct path path = {
+ .mnt = fhp->fh_export->ex_path.mnt,
+ .dentry = fhp->fh_dentry,
+ };
+ __be32 err;
+
+ err = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP | access);
+ if (!err && vfs_statfs(&path, stat))
err = nfserr_io;
return err;
}
#include <linux/security.h>
#include <linux/uaccess.h>
-int vfs_statfs(struct dentry *dentry, struct kstatfs *buf)
+int statfs_by_dentry(struct dentry *dentry, struct kstatfs *buf)
{
- int retval = -ENODEV;
-
- if (dentry) {
- retval = -ENOSYS;
- if (dentry->d_sb->s_op->statfs) {
- memset(buf, 0, sizeof(*buf));
- retval = security_sb_statfs(dentry);
- if (retval)
- return retval;
- retval = dentry->d_sb->s_op->statfs(dentry, buf);
- if (retval == 0 && buf->f_frsize == 0)
- buf->f_frsize = buf->f_bsize;
- }
- }
+ int retval;
+
+ if (!dentry->d_sb->s_op->statfs)
+ return -ENOSYS;
+
+ memset(buf, 0, sizeof(*buf));
+ retval = security_sb_statfs(dentry);
+ if (retval)
+ return retval;
+ retval = dentry->d_sb->s_op->statfs(dentry, buf);
+ if (retval == 0 && buf->f_frsize == 0)
+ buf->f_frsize = buf->f_bsize;
return retval;
}
+int vfs_statfs(struct path *path, struct kstatfs *buf)
+{
+ return statfs_by_dentry(path->dentry, buf);
+}
EXPORT_SYMBOL(vfs_statfs);
-static int vfs_statfs_native(struct dentry *dentry, struct statfs *buf)
+static int do_statfs_native(struct path *path, struct statfs *buf)
{
struct kstatfs st;
int retval;
- retval = vfs_statfs(dentry, &st);
+ retval = vfs_statfs(path, &st);
if (retval)
return retval;
return 0;
}
-static int vfs_statfs64(struct dentry *dentry, struct statfs64 *buf)
+static int do_statfs64(struct path *path, struct statfs64 *buf)
{
struct kstatfs st;
int retval;
- retval = vfs_statfs(dentry, &st);
+ retval = vfs_statfs(path, &st);
if (retval)
return retval;
error = user_path(pathname, &path);
if (!error) {
struct statfs tmp;
- error = vfs_statfs_native(path.dentry, &tmp);
+ error = do_statfs_native(&path, &tmp);
if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
error = -EFAULT;
path_put(&path);
error = user_path(pathname, &path);
if (!error) {
struct statfs64 tmp;
- error = vfs_statfs64(path.dentry, &tmp);
+ error = do_statfs64(&path, &tmp);
if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
error = -EFAULT;
path_put(&path);
file = fget(fd);
if (!file)
goto out;
- error = vfs_statfs_native(file->f_path.dentry, &tmp);
+ error = do_statfs_native(&file->f_path, &tmp);
if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
error = -EFAULT;
fput(file);
file = fget(fd);
if (!file)
goto out;
- error = vfs_statfs64(file->f_path.dentry, &tmp);
+ error = do_statfs64(&file->f_path, &tmp);
if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
error = -EFAULT;
fput(file);
if (!s)
return -EINVAL;
- err = vfs_statfs(s->s_root, &sbuf);
+ err = statfs_by_dentry(s->s_root, &sbuf);
drop_super(s);
if (err)
return err;
extern void drop_collected_mounts(struct vfsmount *);
extern int iterate_mounts(int (*)(struct vfsmount *, void *), void *,
struct vfsmount *);
-extern int vfs_statfs(struct dentry *, struct kstatfs *);
+extern int vfs_statfs(struct path *, struct kstatfs *);
+extern int statfs_by_dentry(struct dentry *, struct kstatfs *);
extern int freeze_super(struct super_block *super);
extern int thaw_super(struct super_block *super);
spin_unlock(&acct_lock);
/* May block */
- if (vfs_statfs(file->f_path.dentry, &sbuf))
+ if (vfs_statfs(&file->f_path, &sbuf))
return res;
suspend = sbuf.f_blocks * SUSPEND;
resume = sbuf.f_blocks * RESUME;