File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/fs/coda/coda_linux.c b/fs/coda/coda_linux.c
new file mode 100644
index 0000000..f1714cf
--- /dev/null
+++ b/fs/coda/coda_linux.c
@@ -0,0 +1,186 @@
+/*
+ * Inode operations for Coda filesystem
+ * Original version: (C) 1996 P. Braam and M. Callahan
+ * Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
+ *
+ * Carnegie Mellon encourages users to contribute improvements to
+ * the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/time.h>
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/uaccess.h>
+#include <linux/string.h>
+
+#include <linux/coda.h>
+#include <linux/coda_psdev.h>
+#include "coda_linux.h"
+
+/* initialize the debugging variables */
+int coda_fake_statfs;
+
+/* print a fid */
+char * coda_f2s(struct CodaFid *f)
+{
+ static char s[60];
+
+ sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]);
+
+ return s;
+}
+
+/* recognize special .CONTROL name */
+int coda_iscontrol(const char *name, size_t length)
+{
+ return ((CODA_CONTROLLEN == length) &&
+ (strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0));
+}
+
+unsigned short coda_flags_to_cflags(unsigned short flags)
+{
+ unsigned short coda_flags = 0;
+
+ if ((flags & O_ACCMODE) == O_RDONLY)
+ coda_flags |= C_O_READ;
+
+ if ((flags & O_ACCMODE) == O_RDWR)
+ coda_flags |= C_O_READ | C_O_WRITE;
+
+ if ((flags & O_ACCMODE) == O_WRONLY)
+ coda_flags |= C_O_WRITE;
+
+ if (flags & O_TRUNC)
+ coda_flags |= C_O_TRUNC;
+
+ if (flags & O_CREAT)
+ coda_flags |= C_O_CREAT;
+
+ if (flags & O_EXCL)
+ coda_flags |= C_O_EXCL;
+
+ return coda_flags;
+}
+
+
+/* utility functions below */
+void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
+{
+ int inode_type;
+ /* inode's i_flags, i_ino are set by iget
+ XXX: is this all we need ??
+ */
+ switch (attr->va_type) {
+ case C_VNON:
+ inode_type = 0;
+ break;
+ case C_VREG:
+ inode_type = S_IFREG;
+ break;
+ case C_VDIR:
+ inode_type = S_IFDIR;
+ break;
+ case C_VLNK:
+ inode_type = S_IFLNK;
+ break;
+ default:
+ inode_type = 0;
+ }
+ inode->i_mode |= inode_type;
+
+ if (attr->va_mode != (u_short) -1)
+ inode->i_mode = attr->va_mode | inode_type;
+ if (attr->va_uid != -1)
+ inode->i_uid = make_kuid(&init_user_ns, (uid_t) attr->va_uid);
+ if (attr->va_gid != -1)
+ inode->i_gid = make_kgid(&init_user_ns, (gid_t) attr->va_gid);
+ if (attr->va_nlink != -1)
+ set_nlink(inode, attr->va_nlink);
+ if (attr->va_size != -1)
+ inode->i_size = attr->va_size;
+ if (attr->va_size != -1)
+ inode->i_blocks = (attr->va_size + 511) >> 9;
+ if (attr->va_atime.tv_sec != -1)
+ inode->i_atime = attr->va_atime;
+ if (attr->va_mtime.tv_sec != -1)
+ inode->i_mtime = attr->va_mtime;
+ if (attr->va_ctime.tv_sec != -1)
+ inode->i_ctime = attr->va_ctime;
+}
+
+
+/*
+ * BSD sets attributes that need not be modified to -1.
+ * Linux uses the valid field to indicate what should be
+ * looked at. The BSD type field needs to be deduced from linux
+ * mode.
+ * So we have to do some translations here.
+ */
+
+void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
+{
+ unsigned int valid;
+
+ /* clean out */
+ vattr->va_mode = -1;
+ vattr->va_uid = (vuid_t) -1;
+ vattr->va_gid = (vgid_t) -1;
+ vattr->va_size = (off_t) -1;
+ vattr->va_atime.tv_sec = (time_t) -1;
+ vattr->va_atime.tv_nsec = (time_t) -1;
+ vattr->va_mtime.tv_sec = (time_t) -1;
+ vattr->va_mtime.tv_nsec = (time_t) -1;
+ vattr->va_ctime.tv_sec = (time_t) -1;
+ vattr->va_ctime.tv_nsec = (time_t) -1;
+ vattr->va_type = C_VNON;
+ vattr->va_fileid = -1;
+ vattr->va_gen = -1;
+ vattr->va_bytes = -1;
+ vattr->va_nlink = -1;
+ vattr->va_blocksize = -1;
+ vattr->va_rdev = -1;
+ vattr->va_flags = 0;
+
+ /* determine the type */
+#if 0
+ mode = iattr->ia_mode;
+ if ( S_ISDIR(mode) ) {
+ vattr->va_type = C_VDIR;
+ } else if ( S_ISREG(mode) ) {
+ vattr->va_type = C_VREG;
+ } else if ( S_ISLNK(mode) ) {
+ vattr->va_type = C_VLNK;
+ } else {
+ /* don't do others */
+ vattr->va_type = C_VNON;
+ }
+#endif
+
+ /* set those vattrs that need change */
+ valid = iattr->ia_valid;
+ if ( valid & ATTR_MODE ) {
+ vattr->va_mode = iattr->ia_mode;
+ }
+ if ( valid & ATTR_UID ) {
+ vattr->va_uid = (vuid_t) from_kuid(&init_user_ns, iattr->ia_uid);
+ }
+ if ( valid & ATTR_GID ) {
+ vattr->va_gid = (vgid_t) from_kgid(&init_user_ns, iattr->ia_gid);
+ }
+ if ( valid & ATTR_SIZE ) {
+ vattr->va_size = iattr->ia_size;
+ }
+ if ( valid & ATTR_ATIME ) {
+ vattr->va_atime = iattr->ia_atime;
+ }
+ if ( valid & ATTR_MTIME ) {
+ vattr->va_mtime = iattr->ia_mtime;
+ }
+ if ( valid & ATTR_CTIME ) {
+ vattr->va_ctime = iattr->ia_ctime;
+ }
+}
+