*
* You should have received a copy of the GNU General Public License along
* with the SPL. If not, see <http://www.gnu.org/licenses/>.
- *****************************************************************************
+ *
* Solaris Porting Layer (SPL) Vnode Implementation.
\*****************************************************************************/
vn_mode_to_vtype(mode_t mode)
{
if (S_ISREG(mode))
- return VREG;
+ return (VREG);
if (S_ISDIR(mode))
- return VDIR;
+ return (VDIR);
if (S_ISCHR(mode))
- return VCHR;
+ return (VCHR);
if (S_ISBLK(mode))
- return VBLK;
+ return (VBLK);
if (S_ISFIFO(mode))
- return VFIFO;
+ return (VFIFO);
if (S_ISLNK(mode))
- return VLNK;
+ return (VLNK);
if (S_ISSOCK(mode))
- return VSOCK;
-
- if (S_ISCHR(mode))
- return VCHR;
+ return (VSOCK);
- return VNON;
+ return (VNON);
} /* vn_mode_to_vtype() */
EXPORT_SYMBOL(vn_mode_to_vtype);
vn_vtype_to_mode(vtype_t vtype)
{
if (vtype == VREG)
- return S_IFREG;
+ return (S_IFREG);
if (vtype == VDIR)
- return S_IFDIR;
+ return (S_IFDIR);
if (vtype == VCHR)
- return S_IFCHR;
+ return (S_IFCHR);
if (vtype == VBLK)
- return S_IFBLK;
+ return (S_IFBLK);
if (vtype == VFIFO)
- return S_IFIFO;
+ return (S_IFIFO);
if (vtype == VLNK)
- return S_IFLNK;
+ return (S_IFLNK);
if (vtype == VSOCK)
- return S_IFSOCK;
+ return (S_IFSOCK);
- return VNON;
+ return (VNON);
} /* vn_vtype_to_mode() */
EXPORT_SYMBOL(vn_vtype_to_mode);
EXPORT_SYMBOL(vn_free);
int
-vn_open(const char *path, uio_seg_t seg, int flags, int mode,
- vnode_t **vpp, int x1, void *x2)
+vn_open(const char *path, uio_seg_t seg, int flags, int mode, vnode_t **vpp,
+ int x1, void *x2)
{
struct file *fp;
struct kstat stat;
if (!(flags & FCREAT) && (flags & FWRITE))
flags |= FEXCL;
- /* Note for filp_open() the two low bits must be remapped to mean:
+ /*
+ * Note for filp_open() the two low bits must be remapped to mean:
* 01 - read-only -> 00 read-only
* 10 - write-only -> 01 write-only
* 11 - read-write -> 10 read-write
fp = filp_open(path, flags, mode);
if (flags & FCREAT)
- (void)xchg(¤t->fs->umask, saved_umask);
+ (void) xchg(¤t->fs->umask, saved_umask);
if (IS_ERR(fp))
return (-PTR_ERR(fp));
-#ifdef HAVE_2ARGS_VFS_GETATTR
+#if defined(HAVE_4ARGS_VFS_GETATTR)
+ rc = vfs_getattr(&fp->f_path, &stat, STATX_TYPE, AT_STATX_SYNC_AS_STAT);
+#elif defined(HAVE_2ARGS_VFS_GETATTR)
rc = vfs_getattr(&fp->f_path, &stat);
#else
rc = vfs_getattr(fp->f_path.mnt, fp->f_dentry, &stat);
int
vn_openat(const char *path, uio_seg_t seg, int flags, int mode,
- vnode_t **vpp, int x1, void *x2, vnode_t *vp, int fd)
+ vnode_t **vpp, int x1, void *x2, vnode_t *vp, int fd)
{
char *realpath;
int len, rc;
if (!realpath)
return (ENOMEM);
- (void)snprintf(realpath, len, "/%s", path);
+ (void) snprintf(realpath, len, "/%s", path);
rc = vn_open(realpath, seg, flags, mode, vpp, x1, x2);
kfree(realpath);
int
vn_rdwr(uio_rw_t uio, vnode_t *vp, void *addr, ssize_t len, offset_t off,
- uio_seg_t seg, int ioflag, rlim64_t x2, void *x3, ssize_t *residp)
+ uio_seg_t seg, int ioflag, rlim64_t x2, void *x3, ssize_t *residp)
{
- loff_t offset;
- mm_segment_t saved_fs;
- struct file *fp;
+ struct file *fp = vp->v_file;
+ loff_t offset = off;
int rc;
ASSERT(uio == UIO_WRITE || uio == UIO_READ);
- ASSERT(vp);
- ASSERT(vp->v_file);
ASSERT(seg == UIO_SYSSPACE);
ASSERT((ioflag & ~FAPPEND) == 0);
- ASSERT(x2 == RLIM64_INFINITY);
- fp = vp->v_file;
-
- offset = off;
if (ioflag & FAPPEND)
offset = fp->f_pos;
- /* Writable user data segment must be briefly increased for this
- * process so we can use the user space read call paths to write
- * in to memory allocated by the kernel. */
- saved_fs = get_fs();
- set_fs(get_ds());
-
if (uio & UIO_WRITE)
- rc = vfs_write(fp, addr, len, &offset);
+ rc = spl_kernel_write(fp, addr, len, &offset);
else
- rc = vfs_read(fp, addr, len, &offset);
+ rc = spl_kernel_read(fp, addr, len, &offset);
- set_fs(saved_fs);
fp->f_pos = offset;
if (rc < 0)
} /* vn_close() */
EXPORT_SYMBOL(vn_close);
-/* vn_seek() does not actually seek it only performs bounds checking on the
+/*
+ * vn_seek() does not actually seek it only performs bounds checking on the
* proposed seek. We perform minimal checking and allow vn_rdwr() to catch
- * anything more serious. */
+ * anything more serious.
+ */
int
vn_seek(vnode_t *vp, offset_t ooff, offset_t *noffp, void *ct)
{
}
EXPORT_SYMBOL(vn_seek);
-/*
- * spl_basename() takes a NULL-terminated string s as input containing a path.
- * It returns a char pointer to a string and a length that describe the
- * basename of the path. If the basename is not "." or "/", it will be an index
- * into the string. While the string should be NULL terminated, the section
- * referring to the basename is not. spl_basename is dual-licensed GPLv2+ and
- * CC0. Anyone wishing to reuse it in another codebase may pick either license.
- */
-static void
-spl_basename(const char *s, const char **str, int *len)
-{
- size_t i, end;
-
- ASSERT(str);
- ASSERT(len);
-
- if (!s || !*s) {
- *str = ".";
- *len = 1;
- return;
- }
-
- i = strlen(s) - 1;
-
- while (i && s[i--] == '/');
-
- if (i == 0) {
- *str = "/";
- *len = 1;
- return;
- }
-
- end = i;
-
- for (end = i; i; i--) {
- if (s[i] == '/') {
- *str = &s[i+1];
- *len = end - i + 1;
- return;
- }
- }
-
- *str = s;
- *len = end + 1;
-}
-
-static struct dentry *
-spl_kern_path_locked(const char *name, struct path *path)
-{
- struct path parent;
- struct dentry *dentry;
- const char *basename;
- int len;
- int rc;
-
- ASSERT(name);
- ASSERT(path);
-
- spl_basename(name, &basename, &len);
-
- /* We do not accept "." or ".." */
- if (len <= 2 && basename[0] == '.')
- if (len == 1 || basename[1] == '.')
- return (ERR_PTR(-EACCES));
-
- rc = kern_path(name, LOOKUP_PARENT, &parent);
- if (rc)
- return (ERR_PTR(rc));
-
- /* use I_MUTEX_PARENT because vfs_unlink needs it */
- spl_inode_lock_nested(parent.dentry->d_inode, I_MUTEX_PARENT);
-
- dentry = lookup_one_len(basename, parent.dentry, len);
- if (IS_ERR(dentry)) {
- spl_inode_unlock(parent.dentry->d_inode);
- path_put(&parent);
- } else {
- *path = parent;
- }
-
- return (dentry);
-}
-
-/* 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;
-
- 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]) {
- rc = 0;
- goto slashes;
- }
-
- inode = dentry->d_inode;
- if (inode) {
- atomic_inc(&inode->i_count);
- } else {
- rc = 0;
- goto slashes;
- }
-
-#ifdef HAVE_2ARGS_VFS_UNLINK
- rc = vfs_unlink(parent.dentry->d_inode, dentry);
-#else
- rc = vfs_unlink(parent.dentry->d_inode, dentry, NULL);
-#endif /* HAVE_2ARGS_VFS_UNLINK */
-exit1:
- dput(dentry);
- } else {
- return (-rc);
- }
-
- spl_inode_unlock(parent.dentry->d_inode);
- if (inode)
- iput(inode); /* truncate the inode here */
-
- path_put(&parent);
- return (-rc);
-
-slashes:
- rc = !dentry->d_inode ? -ENOENT :
- S_ISDIR(dentry->d_inode->i_mode) ? -EISDIR : -ENOTDIR;
- goto exit1;
-} /* 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;
-
- old_dentry = spl_kern_path_locked(oldname, &old_parent);
- if (IS_ERR(old_dentry)) {
- rc = PTR_ERR(old_dentry);
- goto exit;
- }
-
- spl_inode_unlock(old_parent.dentry->d_inode);
-
- new_dentry = spl_kern_path_locked(newname, &new_parent);
- if (IS_ERR(new_dentry)) {
- rc = PTR_ERR(new_dentry);
- goto exit2;
- }
-
- spl_inode_unlock(new_parent.dentry->d_inode);
-
- rc = -EXDEV;
- if (old_parent.mnt != new_parent.mnt)
- goto exit3;
-
- 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)
- goto exit4;
-
- /* target should not be an ancestor of source */
- rc = -ENOTEMPTY;
- if (new_dentry == trap)
- goto exit4;
-
- /* source must exist */
- rc = -ENOENT;
- if (!old_dentry->d_inode)
- goto exit4;
-
- /* 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])
- goto exit4;
- if (new_dentry->d_name.name[new_dentry->d_name.len])
- goto exit4;
- }
-
-#if defined(HAVE_4ARGS_VFS_RENAME)
- rc = vfs_rename(old_dir->d_inode, old_dentry,
- new_dir->d_inode, new_dentry);
-#elif defined(HAVE_5ARGS_VFS_RENAME)
- rc = vfs_rename(old_dir->d_inode, old_dentry,
- new_dir->d_inode, new_dentry, NULL);
-#else
- rc = vfs_rename(old_dir->d_inode, old_dentry,
- new_dir->d_inode, new_dentry, NULL, 0);
-#endif
-exit4:
- unlock_rename(new_dir, old_dir);
-exit3:
- dput(new_dentry);
- path_put(&new_parent);
-exit2:
- dput(old_dentry);
- path_put(&old_parent);
-exit:
- return (-rc);
-}
-EXPORT_SYMBOL(vn_rename);
-
int
vn_getattr(vnode_t *vp, vattr_t *vap, int flags, void *x3, void *x4)
{
fp = vp->v_file;
-#ifdef HAVE_2ARGS_VFS_GETATTR
+#if defined(HAVE_4ARGS_VFS_GETATTR)
+ rc = vfs_getattr(&fp->f_path, &stat, STATX_BASIC_STATS,
+ AT_STATX_SYNC_AS_STAT);
+#elif defined(HAVE_2ARGS_VFS_GETATTR)
rc = vfs_getattr(&fp->f_path, &stat);
#else
rc = vfs_getattr(fp->f_path.mnt, fp->f_dentry, &stat);
if (rc)
return (-rc);
- vap->va_type = vn_mode_to_vtype(stat.mode);
- vap->va_mode = stat.mode;
- 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;
- vap->va_size = stat.size;
- vap->va_blksize = stat.blksize;
- vap->va_atime = stat.atime;
- vap->va_mtime = stat.mtime;
- vap->va_ctime = stat.ctime;
- vap->va_rdev = stat.rdev;
- vap->va_nblocks = stat.blocks;
+ vap->va_type = vn_mode_to_vtype(stat.mode);
+ vap->va_mode = stat.mode;
+ 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;
+ vap->va_size = stat.size;
+ vap->va_blksize = stat.blksize;
+ vap->va_atime = stat.atime;
+ vap->va_mtime = stat.mtime;
+ vap->va_ctime = stat.ctime;
+ vap->va_rdev = stat.rdev;
+ vap->va_nblocks = stat.blocks;
return (0);
}
EXPORT_SYMBOL(vn_getattr);
-int vn_fsync(vnode_t *vp, int flags, void *x3, void *x4)
+int
+vn_fsync(vnode_t *vp, int flags, void *x3, void *x4)
{
int datasync = 0;
int error;
* May enter XFS which generates a warning when PF_FSTRANS is set.
* To avoid this the flag is cleared over vfs_sync() and then reset.
*/
- fstrans = spl_fstrans_check();
+ fstrans = __spl_pf_fstrans_check();
if (fstrans)
- current->flags &= ~(PF_FSTRANS);
+ current->flags &= ~(__SPL_PF_FSTRANS);
error = -spl_filp_fsync(vp->v_file, datasync);
if (fstrans)
- current->flags |= PF_FSTRANS;
+ current->flags |= __SPL_PF_FSTRANS;
return (error);
} /* vn_fsync() */
offset_t offset, void *x6, void *x7)
{
int error = EOPNOTSUPP;
+#ifdef FALLOC_FL_PUNCH_HOLE
+ int fstrans;
+#endif
if (cmd != F_FREESP || bfp->l_whence != 0)
return (EOPNOTSUPP);
ASSERT(bfp->l_start >= 0 && bfp->l_len > 0);
#ifdef FALLOC_FL_PUNCH_HOLE
+ /*
+ * May enter XFS which generates a warning when PF_FSTRANS is set.
+ * To avoid this the flag is cleared over vfs_sync() and then reset.
+ */
+ fstrans = __spl_pf_fstrans_check();
+ if (fstrans)
+ current->flags &= ~(__SPL_PF_FSTRANS);
+
/*
* 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 (fstrans)
+ current->flags |= __SPL_PF_FSTRANS;
+
if (error == 0)
return (0);
#endif
--end;
vp->v_file->f_dentry->d_inode->i_op->truncate_range(
- vp->v_file->f_dentry->d_inode,
- bfp->l_start, end
- );
+ vp->v_file->f_dentry->d_inode, bfp->l_start, end);
+
return (0);
}
#endif
static file_t *
file_find(int fd, struct task_struct *task)
{
- file_t *fp;
-
- ASSERT(spin_is_locked(&vn_file_lock));
+ file_t *fp;
- list_for_each_entry(fp, &vn_file_list, f_list) {
+ list_for_each_entry(fp, &vn_file_list, f_list) {
if (fd == fp->f_fd && fp->f_task == task) {
ASSERT(atomic_read(&fp->f_ref) != 0);
- return fp;
+ return (fp);
}
}
- return NULL;
+ return (NULL);
} /* file_find() */
file_t *
vn_getf(int fd)
{
- struct kstat stat;
+ struct kstat stat;
struct file *lfp;
file_t *fp;
vnode_t *vp;
fp = file_find(fd, current);
if (fp) {
+ lfp = fget(fd);
+ fput(fp->f_file);
+ /*
+ * areleasef() can cause us to see a stale reference when
+ * userspace has reused a file descriptor before areleasef()
+ * has run. fput() the stale reference and replace it. We
+ * retain the original reference count such that the concurrent
+ * areleasef() will decrement its reference and terminate.
+ */
+ if (lfp != fp->f_file) {
+ fp->f_file = lfp;
+ fp->f_vnode->v_file = lfp;
+ }
atomic_inc(&fp->f_ref);
spin_unlock(&vn_file_lock);
return (fp);
if (vp == NULL)
goto out_fget;
-#ifdef HAVE_2ARGS_VFS_GETATTR
+#if defined(HAVE_4ARGS_VFS_GETATTR)
+ rc = vfs_getattr(&lfp->f_path, &stat, STATX_TYPE,
+ AT_STATX_SYNC_AS_STAT);
+#elif defined(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)
+ if (rc)
goto out_vnode;
mutex_enter(&vp->v_lock);
mutex_exit(&fp->f_lock);
kmem_cache_free(vn_file_cache, fp);
out:
- return (NULL);
+ return (NULL);
} /* getf() */
EXPORT_SYMBOL(getf);
return;
}
- list_del(&fp->f_list);
+ list_del(&fp->f_list);
releasef_locked(fp);
}
spin_unlock(&vn_file_lock);
-
- return;
} /* releasef() */
EXPORT_SYMBOL(areleasef);
int
vn_set_pwd(const char *filename)
{
- struct path path;
- mm_segment_t saved_fs;
- int rc;
-
- /*
- * user_path_dir() and __user_walk() both expect 'filename' to be
- * a user space address so we must briefly increase the data segment
- * size to ensure strncpy_from_user() does not fail with -EFAULT.
- */
- saved_fs = get_fs();
- set_fs(get_ds());
-
- rc = user_path_dir(filename, &path);
- if (rc)
+ struct path path;
+ mm_segment_t saved_fs;
+ int rc;
+
+ /*
+ * user_path_dir() and __user_walk() both expect 'filename' to be
+ * a user space address so we must briefly increase the data segment
+ * size to ensure strncpy_from_user() does not fail with -EFAULT.
+ */
+ saved_fs = get_fs();
+ set_fs(get_ds());
+
+ rc = user_path_dir(filename, &path);
+ if (rc)
goto out;
- rc = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_ACCESS);
- if (rc)
+ rc = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_ACCESS);
+ if (rc)
goto dput_and_out;
- vn_set_fs_pwd(current->fs, &path);
+ vn_set_fs_pwd(current->fs, &path);
dput_and_out:
- path_put(&path);
+ path_put(&path);
out:
set_fs(saved_fs);
- return (-rc);
+ return (-rc);
} /* vn_set_pwd() */
EXPORT_SYMBOL(vn_set_pwd);
file_t *fp = buf;
atomic_set(&fp->f_ref, 0);
- mutex_init(&fp->f_lock, NULL, MUTEX_DEFAULT, NULL);
+ mutex_init(&fp->f_lock, NULL, MUTEX_DEFAULT, NULL);
INIT_LIST_HEAD(&fp->f_list);
- return (0);
-} /* file_cache_constructor() */
+ return (0);
+} /* vn_file_cache_constructor() */
static void
vn_file_cache_destructor(void *buf, void *cdrarg)
int
spl_vn_init(void)
{
+ spin_lock_init(&vn_file_lock);
+
vn_cache = kmem_cache_create("spl_vn_cache",
- sizeof(struct vnode), 64,
- vn_cache_constructor,
- vn_cache_destructor,
- NULL, NULL, NULL, KMC_KMEM);
+ sizeof (struct vnode), 64, vn_cache_constructor,
+ vn_cache_destructor, NULL, NULL, NULL, 0);
vn_file_cache = kmem_cache_create("spl_vn_file_cache",
- sizeof(file_t), 64,
- vn_file_cache_constructor,
- vn_file_cache_destructor,
- NULL, NULL, NULL, KMC_KMEM);
+ sizeof (file_t), 64, vn_file_cache_constructor,
+ vn_file_cache_destructor, NULL, NULL, NULL, 0);
+
return (0);
-} /* vn_init() */
+} /* spl_vn_init() */
void
spl_vn_fini(void)
{
- file_t *fp, *next_fp;
+ file_t *fp, *next_fp;
int leaked = 0;
spin_lock(&vn_file_lock);
- list_for_each_entry_safe(fp, next_fp, &vn_file_list, f_list) {
- list_del(&fp->f_list);
+ list_for_each_entry_safe(fp, next_fp, &vn_file_list, f_list) {
+ list_del(&fp->f_list);
releasef_locked(fp);
leaked++;
}
kmem_cache_destroy(vn_file_cache);
kmem_cache_destroy(vn_cache);
-
- return;
-} /* vn_fini() */
+} /* spl_vn_fini() */
projects / mirror_spl-debian.git / blobdiff