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-rw-r--r--fs/Makefile2
-rw-r--r--fs/open.c166
-rw-r--r--fs/statfs.c196
-rw-r--r--fs/super.c25
4 files changed, 197 insertions, 192 deletions
diff --git a/fs/Makefile b/fs/Makefile
index 97f340f14ba2..e6ec1d309b1d 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -11,7 +11,7 @@ obj-y := open.o read_write.o file_table.o super.o \
attr.o bad_inode.o file.o filesystems.o namespace.o \
seq_file.o xattr.o libfs.o fs-writeback.o \
pnode.o drop_caches.o splice.o sync.o utimes.o \
- stack.o fs_struct.o
+ stack.o fs_struct.o statfs.o
ifeq ($(CONFIG_BLOCK),y)
obj-y += buffer.o bio.o block_dev.o direct-io.o mpage.o ioprio.o
diff --git a/fs/open.c b/fs/open.c
index 74e5cd9f718e..5463266db9e6 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -17,7 +17,6 @@
#include <linux/securebits.h>
#include <linux/security.h>
#include <linux/mount.h>
-#include <linux/vfs.h>
#include <linux/fcntl.h>
#include <linux/slab.h>
#include <asm/uaccess.h>
@@ -33,171 +32,6 @@
#include "internal.h"
-int vfs_statfs(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;
- }
- }
- return retval;
-}
-
-EXPORT_SYMBOL(vfs_statfs);
-
-static int vfs_statfs_native(struct dentry *dentry, struct statfs *buf)
-{
- struct kstatfs st;
- int retval;
-
- retval = vfs_statfs(dentry, &st);
- if (retval)
- return retval;
-
- if (sizeof(*buf) == sizeof(st))
- memcpy(buf, &st, sizeof(st));
- else {
- if (sizeof buf->f_blocks == 4) {
- if ((st.f_blocks | st.f_bfree | st.f_bavail |
- st.f_bsize | st.f_frsize) &
- 0xffffffff00000000ULL)
- return -EOVERFLOW;
- /*
- * f_files and f_ffree may be -1; it's okay to stuff
- * that into 32 bits
- */
- if (st.f_files != -1 &&
- (st.f_files & 0xffffffff00000000ULL))
- return -EOVERFLOW;
- if (st.f_ffree != -1 &&
- (st.f_ffree & 0xffffffff00000000ULL))
- return -EOVERFLOW;
- }
-
- buf->f_type = st.f_type;
- buf->f_bsize = st.f_bsize;
- buf->f_blocks = st.f_blocks;
- buf->f_bfree = st.f_bfree;
- buf->f_bavail = st.f_bavail;
- buf->f_files = st.f_files;
- buf->f_ffree = st.f_ffree;
- buf->f_fsid = st.f_fsid;
- buf->f_namelen = st.f_namelen;
- buf->f_frsize = st.f_frsize;
- memset(buf->f_spare, 0, sizeof(buf->f_spare));
- }
- return 0;
-}
-
-static int vfs_statfs64(struct dentry *dentry, struct statfs64 *buf)
-{
- struct kstatfs st;
- int retval;
-
- retval = vfs_statfs(dentry, &st);
- if (retval)
- return retval;
-
- if (sizeof(*buf) == sizeof(st))
- memcpy(buf, &st, sizeof(st));
- else {
- buf->f_type = st.f_type;
- buf->f_bsize = st.f_bsize;
- buf->f_blocks = st.f_blocks;
- buf->f_bfree = st.f_bfree;
- buf->f_bavail = st.f_bavail;
- buf->f_files = st.f_files;
- buf->f_ffree = st.f_ffree;
- buf->f_fsid = st.f_fsid;
- buf->f_namelen = st.f_namelen;
- buf->f_frsize = st.f_frsize;
- memset(buf->f_spare, 0, sizeof(buf->f_spare));
- }
- return 0;
-}
-
-SYSCALL_DEFINE2(statfs, const char __user *, pathname, struct statfs __user *, buf)
-{
- struct path path;
- int error;
-
- error = user_path(pathname, &path);
- if (!error) {
- struct statfs tmp;
- error = vfs_statfs_native(path.dentry, &tmp);
- if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
- error = -EFAULT;
- path_put(&path);
- }
- return error;
-}
-
-SYSCALL_DEFINE3(statfs64, const char __user *, pathname, size_t, sz, struct statfs64 __user *, buf)
-{
- struct path path;
- long error;
-
- if (sz != sizeof(*buf))
- return -EINVAL;
- error = user_path(pathname, &path);
- if (!error) {
- struct statfs64 tmp;
- error = vfs_statfs64(path.dentry, &tmp);
- if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
- error = -EFAULT;
- path_put(&path);
- }
- return error;
-}
-
-SYSCALL_DEFINE2(fstatfs, unsigned int, fd, struct statfs __user *, buf)
-{
- struct file * file;
- struct statfs tmp;
- int error;
-
- error = -EBADF;
- file = fget(fd);
- if (!file)
- goto out;
- error = vfs_statfs_native(file->f_path.dentry, &tmp);
- if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
- error = -EFAULT;
- fput(file);
-out:
- return error;
-}
-
-SYSCALL_DEFINE3(fstatfs64, unsigned int, fd, size_t, sz, struct statfs64 __user *, buf)
-{
- struct file * file;
- struct statfs64 tmp;
- int error;
-
- if (sz != sizeof(*buf))
- return -EINVAL;
-
- error = -EBADF;
- file = fget(fd);
- if (!file)
- goto out;
- error = vfs_statfs64(file->f_path.dentry, &tmp);
- if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
- error = -EFAULT;
- fput(file);
-out:
- return error;
-}
-
int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
struct file *filp)
{
diff --git a/fs/statfs.c b/fs/statfs.c
new file mode 100644
index 000000000000..4ef021f3b612
--- /dev/null
+++ b/fs/statfs.c
@@ -0,0 +1,196 @@
+#include <linux/syscalls.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/namei.h>
+#include <linux/statfs.h>
+#include <linux/security.h>
+#include <linux/uaccess.h>
+
+int vfs_statfs(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;
+ }
+ }
+ return retval;
+}
+
+EXPORT_SYMBOL(vfs_statfs);
+
+static int vfs_statfs_native(struct dentry *dentry, struct statfs *buf)
+{
+ struct kstatfs st;
+ int retval;
+
+ retval = vfs_statfs(dentry, &st);
+ if (retval)
+ return retval;
+
+ if (sizeof(*buf) == sizeof(st))
+ memcpy(buf, &st, sizeof(st));
+ else {
+ if (sizeof buf->f_blocks == 4) {
+ if ((st.f_blocks | st.f_bfree | st.f_bavail |
+ st.f_bsize | st.f_frsize) &
+ 0xffffffff00000000ULL)
+ return -EOVERFLOW;
+ /*
+ * f_files and f_ffree may be -1; it's okay to stuff
+ * that into 32 bits
+ */
+ if (st.f_files != -1 &&
+ (st.f_files & 0xffffffff00000000ULL))
+ return -EOVERFLOW;
+ if (st.f_ffree != -1 &&
+ (st.f_ffree & 0xffffffff00000000ULL))
+ return -EOVERFLOW;
+ }
+
+ buf->f_type = st.f_type;
+ buf->f_bsize = st.f_bsize;
+ buf->f_blocks = st.f_blocks;
+ buf->f_bfree = st.f_bfree;
+ buf->f_bavail = st.f_bavail;
+ buf->f_files = st.f_files;
+ buf->f_ffree = st.f_ffree;
+ buf->f_fsid = st.f_fsid;
+ buf->f_namelen = st.f_namelen;
+ buf->f_frsize = st.f_frsize;
+ memset(buf->f_spare, 0, sizeof(buf->f_spare));
+ }
+ return 0;
+}
+
+static int vfs_statfs64(struct dentry *dentry, struct statfs64 *buf)
+{
+ struct kstatfs st;
+ int retval;
+
+ retval = vfs_statfs(dentry, &st);
+ if (retval)
+ return retval;
+
+ if (sizeof(*buf) == sizeof(st))
+ memcpy(buf, &st, sizeof(st));
+ else {
+ buf->f_type = st.f_type;
+ buf->f_bsize = st.f_bsize;
+ buf->f_blocks = st.f_blocks;
+ buf->f_bfree = st.f_bfree;
+ buf->f_bavail = st.f_bavail;
+ buf->f_files = st.f_files;
+ buf->f_ffree = st.f_ffree;
+ buf->f_fsid = st.f_fsid;
+ buf->f_namelen = st.f_namelen;
+ buf->f_frsize = st.f_frsize;
+ memset(buf->f_spare, 0, sizeof(buf->f_spare));
+ }
+ return 0;
+}
+
+SYSCALL_DEFINE2(statfs, const char __user *, pathname, struct statfs __user *, buf)
+{
+ struct path path;
+ int error;
+
+ error = user_path(pathname, &path);
+ if (!error) {
+ struct statfs tmp;
+ error = vfs_statfs_native(path.dentry, &tmp);
+ if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
+ error = -EFAULT;
+ path_put(&path);
+ }
+ return error;
+}
+
+SYSCALL_DEFINE3(statfs64, const char __user *, pathname, size_t, sz, struct statfs64 __user *, buf)
+{
+ struct path path;
+ long error;
+
+ if (sz != sizeof(*buf))
+ return -EINVAL;
+ error = user_path(pathname, &path);
+ if (!error) {
+ struct statfs64 tmp;
+ error = vfs_statfs64(path.dentry, &tmp);
+ if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
+ error = -EFAULT;
+ path_put(&path);
+ }
+ return error;
+}
+
+SYSCALL_DEFINE2(fstatfs, unsigned int, fd, struct statfs __user *, buf)
+{
+ struct file *file;
+ struct statfs tmp;
+ int error;
+
+ error = -EBADF;
+ file = fget(fd);
+ if (!file)
+ goto out;
+ error = vfs_statfs_native(file->f_path.dentry, &tmp);
+ if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
+ error = -EFAULT;
+ fput(file);
+out:
+ return error;
+}
+
+SYSCALL_DEFINE3(fstatfs64, unsigned int, fd, size_t, sz, struct statfs64 __user *, buf)
+{
+ struct file *file;
+ struct statfs64 tmp;
+ int error;
+
+ if (sz != sizeof(*buf))
+ return -EINVAL;
+
+ error = -EBADF;
+ file = fget(fd);
+ if (!file)
+ goto out;
+ error = vfs_statfs64(file->f_path.dentry, &tmp);
+ if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
+ error = -EFAULT;
+ fput(file);
+out:
+ return error;
+}
+
+SYSCALL_DEFINE2(ustat, unsigned, dev, struct ustat __user *, ubuf)
+{
+ struct super_block *s;
+ struct ustat tmp;
+ struct kstatfs sbuf;
+ int err;
+
+ s = user_get_super(new_decode_dev(dev));
+ if (!s)
+ return -EINVAL;
+
+ err = vfs_statfs(s->s_root, &sbuf);
+ drop_super(s);
+ if (err)
+ return err;
+
+ memset(&tmp,0,sizeof(struct ustat));
+ tmp.f_tfree = sbuf.f_bfree;
+ tmp.f_tinode = sbuf.f_ffree;
+
+ return copy_to_user(ubuf, &tmp, sizeof(struct ustat)) ? -EFAULT : 0;
+}
diff --git a/fs/super.c b/fs/super.c
index 2c3e370c60d9..dba74e718751 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -31,7 +31,6 @@
#include <linux/mount.h>
#include <linux/security.h>
#include <linux/syscalls.h>
-#include <linux/vfs.h>
#include <linux/writeback.h> /* for the emergency remount stuff */
#include <linux/idr.h>
#include <linux/kobject.h>
@@ -519,30 +518,6 @@ rescan:
return NULL;
}
-SYSCALL_DEFINE2(ustat, unsigned, dev, struct ustat __user *, ubuf)
-{
- struct super_block *s;
- struct ustat tmp;
- struct kstatfs sbuf;
- int err = -EINVAL;
-
- s = user_get_super(new_decode_dev(dev));
- if (s == NULL)
- goto out;
- err = vfs_statfs(s->s_root, &sbuf);
- drop_super(s);
- if (err)
- goto out;
-
- memset(&tmp,0,sizeof(struct ustat));
- tmp.f_tfree = sbuf.f_bfree;
- tmp.f_tinode = sbuf.f_ffree;
-
- err = copy_to_user(ubuf,&tmp,sizeof(struct ustat)) ? -EFAULT : 0;
-out:
- return err;
-}
-
/**
* do_remount_sb - asks filesystem to change mount options.
* @sb: superblock in question
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 07:31:31 +0000