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@xxxxxx>
Index: linux-2.6/fs/ecryptfs/super.c
===================================================================
--- linux-2.6.orig/fs/ecryptfs/super.c 2010-06-27 11:19:11.404004019 +0200
+++ linux-2.6/fs/ecryptfs/super.c 2010-06-27 11:19:30.519254332 +0200
@@ -118,7 +118,11 @@ void ecryptfs_init_inode(struct inode *i
*/
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);
}
/**
Index: linux-2.6/arch/parisc/hpux/sys_hpux.c
===================================================================
--- linux-2.6.orig/arch/parisc/hpux/sys_hpux.c 2010-06-27 11:19:11.469004368 +0200
+++ linux-2.6/arch/parisc/hpux/sys_hpux.c 2010-06-27 11:19:30.520254821 +0200
@@ -145,7 +145,7 @@ static int hpux_ustat(dev_t dev, struct
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;
@@ -186,12 +186,12 @@ struct hpux_statfs {
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;
@@ -219,7 +219,7 @@ asmlinkage long hpux_statfs(const char _
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);
@@ -237,7 +237,7 @@ asmlinkage long hpux_fstatfs(unsigned in
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);
Index: linux-2.6/fs/cachefiles/bind.c
===================================================================
--- linux-2.6.orig/fs/cachefiles/bind.c 2010-06-27 11:19:11.412004368 +0200
+++ linux-2.6/fs/cachefiles/bind.c 2010-06-27 11:19:30.525254541 +0200
@@ -146,7 +146,7 @@ static int cachefiles_daemon_add_cache(s
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;
Index: linux-2.6/fs/cachefiles/daemon.c
===================================================================
--- linux-2.6.orig/fs/cachefiles/daemon.c 2010-06-27 11:19:11.420004088 +0200
+++ linux-2.6/fs/cachefiles/daemon.c 2010-06-27 11:19:30.532254751 +0200
@@ -683,6 +683,10 @@ int cachefiles_has_space(struct cachefil
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",
@@ -697,7 +701,7 @@ int cachefiles_has_space(struct cachefil
/* 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");
Index: linux-2.6/fs/compat.c
===================================================================
--- linux-2.6.orig/fs/compat.c 2010-06-27 11:19:11.427004577 +0200
+++ linux-2.6/fs/compat.c 2010-06-27 11:19:30.538253773 +0200
@@ -266,7 +266,7 @@ asmlinkage long compat_sys_statfs(const
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);
@@ -284,7 +284,7 @@ asmlinkage long compat_sys_fstatfs(unsig
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);
@@ -334,7 +334,7 @@ asmlinkage long compat_sys_statfs64(cons
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);
@@ -355,7 +355,7 @@ asmlinkage long compat_sys_fstatfs64(uns
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);
@@ -378,7 +378,7 @@ asmlinkage long compat_sys_ustat(unsigne
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;
Index: linux-2.6/fs/nfsd/nfs4xdr.c
===================================================================
--- linux-2.6.orig/fs/nfsd/nfs4xdr.c 2010-06-27 11:19:11.434004298 +0200
+++ linux-2.6/fs/nfsd/nfs4xdr.c 2010-06-27 11:19:30.544254821 +0200
@@ -1756,6 +1756,10 @@ nfsd4_encode_fattr(struct svc_fh *fhp, s
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));
@@ -1776,7 +1780,7 @@ nfsd4_encode_fattr(struct svc_fh *fhp, s
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;
}
Index: linux-2.6/fs/nfsd/vfs.c
===================================================================
--- linux-2.6.orig/fs/nfsd/vfs.c 2010-06-27 11:19:11.443004438 +0200
+++ linux-2.6/fs/nfsd/vfs.c 2010-06-27 11:19:30.550253843 +0200
@@ -2019,8 +2019,14 @@ out:
__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;
}
Index: linux-2.6/fs/statfs.c
===================================================================
--- linux-2.6.orig/fs/statfs.c 2010-06-27 11:19:11.450004368 +0200
+++ linux-2.6/fs/statfs.c 2010-06-27 11:19:30.555254402 +0200
@@ -7,33 +7,35 @@
#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;
+ int retval;
- 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;
- }
- }
+ 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;
@@ -72,12 +74,12 @@ static int vfs_statfs_native(struct dent
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;
@@ -107,7 +109,7 @@ SYSCALL_DEFINE2(statfs, const char __use
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);
@@ -125,7 +127,7 @@ SYSCALL_DEFINE3(statfs64, const char __u
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);
@@ -143,7 +145,7 @@ SYSCALL_DEFINE2(fstatfs, unsigned int, f
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);
@@ -164,7 +166,7 @@ SYSCALL_DEFINE3(fstatfs64, unsigned int,
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);
@@ -183,7 +185,7 @@ SYSCALL_DEFINE2(ustat, unsigned, dev, st
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;
Index: linux-2.6/include/linux/fs.h
===================================================================
--- linux-2.6.orig/include/linux/fs.h 2010-06-27 11:19:11.479003949 +0200
+++ linux-2.6/include/linux/fs.h 2010-06-27 11:19:30.560253913 +0200
@@ -1800,7 +1800,8 @@ extern struct vfsmount *collect_mounts(s
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);
Index: linux-2.6/kernel/acct.c
===================================================================
--- linux-2.6.orig/kernel/acct.c 2010-06-27 11:19:11.487003949 +0200
+++ linux-2.6/kernel/acct.c 2010-06-27 11:19:30.568254192 +0200
@@ -122,7 +122,7 @@ static int check_free_space(struct bsd_a
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;
Index: linux-2.6/arch/alpha/kernel/osf_sys.c
===================================================================
--- linux-2.6.orig/arch/alpha/kernel/osf_sys.c 2010-06-27 11:19:35.033254192 +0200
+++ linux-2.6/arch/alpha/kernel/osf_sys.c 2010-06-27 11:20:07.802254192 +0200
@@ -234,11 +234,11 @@ linux_to_osf_statfs(struct kstatfs *linu
}
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;
@@ -252,7 +252,7 @@ SYSCALL_DEFINE3(osf_statfs, char __user
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;
@@ -267,7 +267,7 @@ SYSCALL_DEFINE3(osf_fstatfs, unsigned lo
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;
--
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