mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
206 lines
5.4 KiB
206 lines
5.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* 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 ([email protected]). |
|
*/ |
|
|
|
#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 "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; |
|
} |
|
|
|
static struct timespec64 coda_to_timespec64(struct coda_timespec ts) |
|
{ |
|
struct timespec64 ts64 = { |
|
.tv_sec = ts.tv_sec, |
|
.tv_nsec = ts.tv_nsec, |
|
}; |
|
|
|
return ts64; |
|
} |
|
|
|
static struct coda_timespec timespec64_to_coda(struct timespec64 ts64) |
|
{ |
|
struct coda_timespec ts = { |
|
.tv_sec = ts64.tv_sec, |
|
.tv_nsec = ts64.tv_nsec, |
|
}; |
|
|
|
return ts; |
|
} |
|
|
|
/* 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 = coda_to_timespec64(attr->va_atime); |
|
if (attr->va_mtime.tv_sec != -1) |
|
inode->i_mtime = coda_to_timespec64(attr->va_mtime); |
|
if (attr->va_ctime.tv_sec != -1) |
|
inode->i_ctime = coda_to_timespec64(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 = (int64_t) -1; |
|
vattr->va_atime.tv_nsec = (long) -1; |
|
vattr->va_mtime.tv_sec = (int64_t) -1; |
|
vattr->va_mtime.tv_nsec = (long) -1; |
|
vattr->va_ctime.tv_sec = (int64_t) -1; |
|
vattr->va_ctime.tv_nsec = (long) -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 = timespec64_to_coda(iattr->ia_atime); |
|
} |
|
if ( valid & ATTR_MTIME ) { |
|
vattr->va_mtime = timespec64_to_coda(iattr->ia_mtime); |
|
} |
|
if ( valid & ATTR_CTIME ) { |
|
vattr->va_ctime = timespec64_to_coda(iattr->ia_ctime); |
|
} |
|
} |
|
|
|
|