* UCRL-CODE-235197
*
* This file is part of the SPL, Solaris Porting Layer.
- * For details, see <http://github.com/behlendorf/spl/>.
+ * For details, see <http://zfsonlinux.org/>.
*
* The SPL is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Solaris Porting Layer (SPL) Vnode Implementation.
\*****************************************************************************/
+#include <sys/cred.h>
#include <sys/vnode.h>
+#include <linux/falloc.h>
#include <spl-debug.h>
#ifdef SS_DEBUG_SUBSYS
static DEFINE_SPINLOCK(vn_file_lock);
static LIST_HEAD(vn_file_list);
+#ifdef HAVE_KERN_PATH_PARENT_HEADER
+#ifndef HAVE_KERN_PATH_PARENT_SYMBOL
+kern_path_parent_t kern_path_parent_fn = SYMBOL_POISON;
+EXPORT_SYMBOL(kern_path_parent_fn);
+#endif /* HAVE_KERN_PATH_PARENT_SYMBOL */
+#endif /* HAVE_KERN_PATH_PARENT_HEADER */
+
+#ifdef HAVE_KERN_PATH_LOCKED
+kern_path_locked_t kern_path_locked_fn = SYMBOL_POISON;
+#endif /* HAVE_KERN_PATH_LOCKED */
+
vtype_t
vn_mode_to_vtype(mode_t mode)
{
if (IS_ERR(fp))
SRETURN(-PTR_ERR(fp));
- rc = vfs_getattr(fp->f_vfsmnt, fp->f_dentry, &stat);
+#ifdef HAVE_2ARGS_VFS_GETATTR
+ rc = vfs_getattr(&fp->f_path, &stat);
+#else
+ rc = vfs_getattr(fp->f_path.mnt, fp->f_dentry, &stat);
+#endif
if (rc) {
filp_close(fp, 0);
SRETURN(-rc);
}
EXPORT_SYMBOL(vn_seek);
+#ifdef HAVE_KERN_PATH_LOCKED
+/* Based on do_unlinkat() from linux/fs/namei.c */
+int
+vn_remove(const char *path, uio_seg_t seg, int flags)
+{
+ struct dentry *dentry;
+ struct path parent;
+ struct inode *inode = NULL;
+ int rc = 0;
+ SENTRY;
+
+ ASSERT(seg == UIO_SYSSPACE);
+ ASSERT(flags == RMFILE);
+
+ dentry = spl_kern_path_locked(path, &parent);
+ rc = PTR_ERR(dentry);
+ if (!IS_ERR(dentry)) {
+ if (parent.dentry->d_name.name[parent.dentry->d_name.len])
+ SGOTO(slashes, rc = 0);
+
+ inode = dentry->d_inode;
+ if (!inode)
+ SGOTO(slashes, rc = 0);
+
+ if (inode)
+ ihold(inode);
+
+ rc = vfs_unlink(parent.dentry->d_inode, dentry);
+exit1:
+ dput(dentry);
+ } else {
+ return (-rc);
+ }
+
+ spl_inode_unlock(parent.dentry->d_inode);
+ if (inode)
+ iput(inode); /* truncate the inode here */
+
+ path_put(&parent);
+ SRETURN(-rc);
+
+slashes:
+ rc = !dentry->d_inode ? -ENOENT :
+ S_ISDIR(dentry->d_inode->i_mode) ? -EISDIR : -ENOTDIR;
+ SGOTO(exit1, rc);
+} /* vn_remove() */
+EXPORT_SYMBOL(vn_remove);
+
+/* Based on do_rename() from linux/fs/namei.c */
+int
+vn_rename(const char *oldname, const char *newname, int x1)
+{
+ struct dentry *old_dir, *new_dir;
+ struct dentry *old_dentry, *new_dentry;
+ struct dentry *trap;
+ struct path old_parent, new_parent;
+ int rc = 0;
+ SENTRY;
+
+ old_dentry = spl_kern_path_locked(oldname, &old_parent);
+ if (IS_ERR(old_dentry))
+ SGOTO(exit, rc = PTR_ERR(old_dentry));
+
+ spl_inode_unlock(old_parent.dentry->d_inode);
+
+ new_dentry = spl_kern_path_locked(newname, &new_parent);
+ if (IS_ERR(new_dentry))
+ SGOTO(exit2, rc = PTR_ERR(new_dentry));
+
+ spl_inode_unlock(new_parent.dentry->d_inode);
+
+ rc = -EXDEV;
+ if (old_parent.mnt != new_parent.mnt)
+ SGOTO(exit3, rc);
+
+ old_dir = old_parent.dentry;
+ new_dir = new_parent.dentry;
+ trap = lock_rename(new_dir, old_dir);
+
+ /* source should not be ancestor of target */
+ rc = -EINVAL;
+ if (old_dentry == trap)
+ SGOTO(exit4, rc);
+
+ /* target should not be an ancestor of source */
+ rc = -ENOTEMPTY;
+ if (new_dentry == trap)
+ SGOTO(exit4, rc);
+
+ /* source must exist */
+ rc = -ENOENT;
+ if (!old_dentry->d_inode)
+ SGOTO(exit4, rc);
+
+ /* unless the source is a directory trailing slashes give -ENOTDIR */
+ if (!S_ISDIR(old_dentry->d_inode->i_mode)) {
+ rc = -ENOTDIR;
+ if (old_dentry->d_name.name[old_dentry->d_name.len])
+ SGOTO(exit4, rc);
+ if (new_dentry->d_name.name[new_dentry->d_name.len])
+ SGOTO(exit4, rc);
+ }
+
+#ifdef HAVE_4ARGS_VFS_RENAME
+ rc = vfs_rename(old_dir->d_inode, old_dentry,
+ new_dir->d_inode, new_dentry);
+#else
+ rc = vfs_rename(old_dir->d_inode, old_dentry, oldnd.nd_mnt,
+ new_dir->d_inode, new_dentry, newnd.nd_mnt);
+#endif /* HAVE_4ARGS_VFS_RENAME */
+exit4:
+ unlock_rename(new_dir, old_dir);
+exit3:
+ dput(new_dentry);
+ path_put(&new_parent);
+exit2:
+ dput(old_dentry);
+ path_put(&old_parent);
+exit:
+ SRETURN(-rc);
+}
+EXPORT_SYMBOL(vn_rename);
+
+#else
static struct dentry *
vn_lookup_hash(struct nameidata *nd)
{
SRETURN(-rc);
}
EXPORT_SYMBOL(vn_rename);
+#endif /* HAVE_KERN_PATH_LOCKED */
int
vn_getattr(vnode_t *vp, vattr_t *vap, int flags, void *x3, void *x4)
fp = vp->v_file;
- rc = vfs_getattr(fp->f_vfsmnt, fp->f_dentry, &stat);
+#ifdef HAVE_2ARGS_VFS_GETATTR
+ rc = vfs_getattr(&fp->f_path, &stat);
+#else
+ rc = vfs_getattr(fp->f_path.mnt, fp->f_dentry, &stat);
+#endif
if (rc)
SRETURN(-rc);
vap->va_type = vn_mode_to_vtype(stat.mode);
vap->va_mode = stat.mode;
- vap->va_uid = stat.uid;
- vap->va_gid = stat.gid;
+ vap->va_uid = KUID_TO_SUID(stat.uid);
+ vap->va_gid = KGID_TO_SGID(stat.gid);
vap->va_fsid = 0;
vap->va_nodeid = stat.ino;
vap->va_nlink = stat.nlink;
} /* vn_fsync() */
EXPORT_SYMBOL(vn_fsync);
+int vn_space(vnode_t *vp, int cmd, struct flock *bfp, int flag,
+ offset_t offset, void *x6, void *x7)
+{
+ int error = EOPNOTSUPP;
+ SENTRY;
+
+ if (cmd != F_FREESP || bfp->l_whence != 0)
+ SRETURN(EOPNOTSUPP);
+
+ ASSERT(vp);
+ ASSERT(vp->v_file);
+ ASSERT(bfp->l_start >= 0 && bfp->l_len > 0);
+
+#ifdef FALLOC_FL_PUNCH_HOLE
+ /*
+ * When supported by the underlying file system preferentially
+ * use the fallocate() callback to preallocate the space.
+ */
+ error = -spl_filp_fallocate(vp->v_file,
+ FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE,
+ bfp->l_start, bfp->l_len);
+ if (error == 0)
+ SRETURN(0);
+#endif
+
+#ifdef HAVE_INODE_TRUNCATE_RANGE
+ if (vp->v_file->f_dentry && vp->v_file->f_dentry->d_inode &&
+ vp->v_file->f_dentry->d_inode->i_op &&
+ vp->v_file->f_dentry->d_inode->i_op->truncate_range) {
+ off_t end = bfp->l_start + bfp->l_len;
+ /*
+ * Judging from the code in shmem_truncate_range(),
+ * it seems the kernel expects the end offset to be
+ * inclusive and aligned to the end of a page.
+ */
+ if (end % PAGE_SIZE != 0) {
+ end &= ~(off_t)(PAGE_SIZE - 1);
+ if (end <= bfp->l_start)
+ SRETURN(0);
+ }
+ --end;
+
+ vp->v_file->f_dentry->d_inode->i_op->truncate_range(
+ vp->v_file->f_dentry->d_inode,
+ bfp->l_start, end
+ );
+ SRETURN(0);
+ }
+#endif
+
+ SRETURN(error);
+}
+EXPORT_SYMBOL(vn_space);
+
/* Function must be called while holding the vn_file_lock */
static file_t *
file_find(int fd)
if (vp == NULL)
SGOTO(out_fget, rc);
- if (vfs_getattr(lfp->f_vfsmnt, lfp->f_dentry, &stat))
+#ifdef HAVE_2ARGS_VFS_GETATTR
+ rc = vfs_getattr(&lfp->f_path, &stat);
+#else
+ rc = vfs_getattr(lfp->f_path.mnt, lfp->f_dentry, &stat);
+#endif
+ if (rc)
SGOTO(out_vnode, rc);
mutex_enter(&vp->v_lock);
EXPORT_SYMBOL(releasef);
#ifndef HAVE_SET_FS_PWD
-# ifdef HAVE_2ARGS_SET_FS_PWD
-/* Used from 2.6.25 - 2.6.31+ */
void
+# ifdef HAVE_SET_FS_PWD_WITH_CONST
+set_fs_pwd(struct fs_struct *fs, const struct path *path)
+# else
set_fs_pwd(struct fs_struct *fs, struct path *path)
+# endif
{
struct path old_pwd;
if (old_pwd.dentry)
path_put(&old_pwd);
}
-# else
-/* Used from 2.6.11 - 2.6.24 */
-void
-set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt, struct dentry *dentry)
-{
- struct dentry *old_pwd;
- struct vfsmount *old_pwdmnt;
-
- write_lock(&fs->lock);
- old_pwd = fs->pwd;
- old_pwdmnt = fs->pwdmnt;
- fs->pwdmnt = mntget(mnt);
- fs->pwd = dget(dentry);
- write_unlock(&fs->lock);
-
- if (old_pwd) {
- dput(old_pwd);
- mntput(old_pwdmnt);
- }
-}
-# endif /* HAVE_2ARGS_SET_FS_PWD */
#endif /* HAVE_SET_FS_PWD */
int
vn_set_pwd(const char *filename)
{
-#if defined(HAVE_2ARGS_SET_FS_PWD) && defined(HAVE_USER_PATH_DIR)
+#ifdef HAVE_USER_PATH_DIR
struct path path;
#else
struct nameidata nd;
-#endif /* HAVE_2ARGS_SET_FS_PWD */
+#endif /* HAVE_USER_PATH_DIR */
mm_segment_t saved_fs;
int rc;
SENTRY;
saved_fs = get_fs();
set_fs(get_ds());
-#ifdef HAVE_2ARGS_SET_FS_PWD
# ifdef HAVE_USER_PATH_DIR
rc = user_path_dir(filename, &path);
if (rc)
dput_and_out:
path_put(&nd.path);
# endif /* HAVE_USER_PATH_DIR */
-#else
- rc = __user_walk(filename,
- LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_CHDIR, &nd);
- if (rc)
- SGOTO(out, rc);
-
- rc = vfs_permission(&nd, MAY_EXEC);
- if (rc)
- SGOTO(dput_and_out, rc);
-
- set_fs_pwd(current->fs, nd.nd_mnt, nd.nd_dentry);
-
-dput_and_out:
- vn_path_release(&nd);
-#endif /* HAVE_2ARGS_SET_FS_PWD */
out:
set_fs(saved_fs);
mutex_destroy(&fp->f_lock);
} /* vn_file_cache_destructor() */
+int spl_vn_init_kallsyms_lookup(void)
+{
+#ifdef HAVE_KERN_PATH_PARENT_HEADER
+#ifndef HAVE_KERN_PATH_PARENT_SYMBOL
+ kern_path_parent_fn = (kern_path_parent_t)
+ spl_kallsyms_lookup_name("kern_path_parent");
+ if (!kern_path_parent_fn) {
+ printk(KERN_ERR "Error: Unknown symbol kern_path_parent\n");
+ return -EFAULT;
+ }
+#endif /* HAVE_KERN_PATH_PARENT_SYMBOL */
+#endif /* HAVE_KERN_PATH_PARENT_HEADER */
+
+#ifdef HAVE_KERN_PATH_LOCKED
+ kern_path_locked_fn = (kern_path_locked_t)
+ spl_kallsyms_lookup_name("kern_path_locked");
+ if (!kern_path_locked_fn) {
+ printk(KERN_ERR "Error: Unknown symbol kern_path_locked\n");
+ return -EFAULT;
+ }
+#endif
+
+ return (0);
+}
+
int
-vn_init(void)
+spl_vn_init(void)
{
SENTRY;
vn_cache = kmem_cache_create("spl_vn_cache",
} /* vn_init() */
void
-vn_fini(void)
+spl_vn_fini(void)
{
file_t *fp, *next_fp;
int leaked = 0;
leaked++;
}
- kmem_cache_destroy(vn_file_cache);
- vn_file_cache = NULL;
spin_unlock(&vn_file_lock);
if (leaked > 0)
SWARN("Warning %d files leaked\n", leaked);
+ kmem_cache_destroy(vn_file_cache);
kmem_cache_destroy(vn_cache);
SEXIT;
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