[mirror_ubuntu-bionic-kernel.git] / fs / coda / coda_linux.c

// 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 (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;
	}
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/*
	3	* Inode operations for Coda filesystem
	4	* Original version: (C) 1996 P. Braam and M. Callahan
	5	* Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
	6	*
	7	* Carnegie Mellon encourages users to contribute improvements to
	8	* the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
	9	*/
	10
	11	#include <linux/types.h>
	12	#include <linux/kernel.h>
	13	#include <linux/time.h>
	14	#include <linux/fs.h>
	15	#include <linux/stat.h>
	16	#include <linux/errno.h>
834b46c3	17	#include <linux/uaccess.h>
1da177e4 LT	18	#include <linux/string.h>
	19
	20	#include <linux/coda.h>
1da177e4	21	#include <linux/coda_psdev.h>
31a203df	22	#include "coda_linux.h"
1da177e4 LT	23
	24	/* initialize the debugging variables */
	25	int coda_fake_statfs;
	26
	27	/* print a fid */
	28	char * coda_f2s(struct CodaFid *f)
	29	{
	30	static char s[60];
de0ca06a	31
1da177e4	32	sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]);
de0ca06a	33
1da177e4 LT	34	return s;
	35	}
	36
	37	/* recognize special .CONTROL name */
	38	int coda_iscontrol(const char *name, size_t length)
	39	{
	40	return ((CODA_CONTROLLEN == length) &&
	41	(strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0));
	42	}
	43
1da177e4 LT	44	unsigned short coda_flags_to_cflags(unsigned short flags)
	45	{
	46	unsigned short coda_flags = 0;
	47
	48	if ((flags & O_ACCMODE) == O_RDONLY)
	49	coda_flags \|= C_O_READ;
	50
	51	if ((flags & O_ACCMODE) == O_RDWR)
	52	coda_flags \|= C_O_READ \| C_O_WRITE;
	53
	54	if ((flags & O_ACCMODE) == O_WRONLY)
	55	coda_flags \|= C_O_WRITE;
	56
	57	if (flags & O_TRUNC)
	58	coda_flags \|= C_O_TRUNC;
	59
	60	if (flags & O_CREAT)
	61	coda_flags \|= C_O_CREAT;
	62
	63	if (flags & O_EXCL)
	64	coda_flags \|= C_O_EXCL;
	65
	66	return coda_flags;
	67	}
	68
	69
	70	/* utility functions below */
	71	void coda_vattr_to_iattr(struct inode inode, struct coda_vattr attr)
	72	{
	73	int inode_type;
	74	/* inode's i_flags, i_ino are set by iget
	75	XXX: is this all we need ??
	76	*/
	77	switch (attr->va_type) {
	78	case C_VNON:
	79	inode_type = 0;
	80	break;
	81	case C_VREG:
	82	inode_type = S_IFREG;
	83	break;
	84	case C_VDIR:
	85	inode_type = S_IFDIR;
	86	break;
	87	case C_VLNK:
	88	inode_type = S_IFLNK;
	89	break;
	90	default:
	91	inode_type = 0;
	92	}
	93	inode->i_mode \|= inode_type;
	94
	95	if (attr->va_mode != (u_short) -1)
	96	inode->i_mode = attr->va_mode \| inode_type;
	97	if (attr->va_uid != -1)
d83f5901	98	inode->i_uid = make_kuid(&init_user_ns, (uid_t) attr->va_uid);
1da177e4	99	if (attr->va_gid != -1)
d83f5901	100	inode->i_gid = make_kgid(&init_user_ns, (gid_t) attr->va_gid);
1da177e4	101	if (attr->va_nlink != -1)
bfe86848	102	set_nlink(inode, attr->va_nlink);
1da177e4 LT	103	if (attr->va_size != -1)
1da177e4 LT	104	inode->i_size = attr->va_size;
1da177e4 LT	105	if (attr->va_size != -1)
	106	inode->i_blocks = (attr->va_size + 511) >> 9;
	107	if (attr->va_atime.tv_sec != -1)
	108	inode->i_atime = attr->va_atime;
	109	if (attr->va_mtime.tv_sec != -1)
	110	inode->i_mtime = attr->va_mtime;
	111	if (attr->va_ctime.tv_sec != -1)
	112	inode->i_ctime = attr->va_ctime;
	113	}
	114
	115
	116	/*
	117	* BSD sets attributes that need not be modified to -1.
	118	* Linux uses the valid field to indicate what should be
	119	* looked at. The BSD type field needs to be deduced from linux
	120	* mode.
	121	* So we have to do some translations here.
	122	*/
	123
	124	void coda_iattr_to_vattr(struct iattr iattr, struct coda_vattr vattr)
	125	{
	126	unsigned int valid;
	127
	128	/* clean out */
a2d416dc	129	vattr->va_mode = -1;
1da177e4 LT	130	vattr->va_uid = (vuid_t) -1;
	131	vattr->va_gid = (vgid_t) -1;
	132	vattr->va_size = (off_t) -1;
	133	vattr->va_atime.tv_sec = (time_t) -1;
	134	vattr->va_atime.tv_nsec = (time_t) -1;
	135	vattr->va_mtime.tv_sec = (time_t) -1;
	136	vattr->va_mtime.tv_nsec = (time_t) -1;
	137	vattr->va_ctime.tv_sec = (time_t) -1;
	138	vattr->va_ctime.tv_nsec = (time_t) -1;
	139	vattr->va_type = C_VNON;
	140	vattr->va_fileid = -1;
	141	vattr->va_gen = -1;
	142	vattr->va_bytes = -1;
	143	vattr->va_nlink = -1;
	144	vattr->va_blocksize = -1;
	145	vattr->va_rdev = -1;
	146	vattr->va_flags = 0;
	147
	148	/* determine the type */
	149	#if 0
	150	mode = iattr->ia_mode;
	151	if ( S_ISDIR(mode) ) {
	152	vattr->va_type = C_VDIR;
	153	} else if ( S_ISREG(mode) ) {
	154	vattr->va_type = C_VREG;
	155	} else if ( S_ISLNK(mode) ) {
	156	vattr->va_type = C_VLNK;
	157	} else {
	158	/* don't do others */
	159	vattr->va_type = C_VNON;
	160	}
	161	#endif
	162
	163	/* set those vattrs that need change */
	164	valid = iattr->ia_valid;
	165	if ( valid & ATTR_MODE ) {
	166	vattr->va_mode = iattr->ia_mode;
	167	}
	168	if ( valid & ATTR_UID ) {
d83f5901	169	vattr->va_uid = (vuid_t) from_kuid(&init_user_ns, iattr->ia_uid);
1da177e4 LT	170	}
1da177e4 LT	171	if ( valid & ATTR_GID ) {
d83f5901	172	vattr->va_gid = (vgid_t) from_kgid(&init_user_ns, iattr->ia_gid);
1da177e4 LT	173	}
	174	if ( valid & ATTR_SIZE ) {
	175	vattr->va_size = iattr->ia_size;
	176	}
	177	if ( valid & ATTR_ATIME ) {
	178	vattr->va_atime = iattr->ia_atime;
	179	}
	180	if ( valid & ATTR_MTIME ) {
	181	vattr->va_mtime = iattr->ia_mtime;
	182	}
	183	if ( valid & ATTR_CTIME ) {
	184	vattr->va_ctime = iattr->ia_ctime;
	185	}
	186	}
	187