[linux-2.6-block.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 "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);
	}
}
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>
8fc8b9df	21	#include "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
5e7c31df	69	static struct timespec64 coda_to_timespec64(struct coda_timespec ts)
6ced9aa7	70	{
6ced9aa7 AB	71	struct timespec64 ts64 = {
	72	.tv_sec = ts.tv_sec,
	73	.tv_nsec = ts.tv_nsec,
	74	};
	75
	76	return ts64;
	77	}
	78
5e7c31df	79	static struct coda_timespec timespec64_to_coda(struct timespec64 ts64)
6ced9aa7	80	{
5e7c31df JH	81	struct coda_timespec ts = {
5e7c31df JH	82	.tv_sec = ts64.tv_sec,
6ced9aa7 AB	83	.tv_nsec = ts64.tv_nsec,
	84	};
	85
	86	return ts;
	87	}
1da177e4 LT	88
	89	/* utility functions below */
	90	void coda_vattr_to_iattr(struct inode inode, struct coda_vattr attr)
	91	{
	92	int inode_type;
	93	/* inode's i_flags, i_ino are set by iget
	94	XXX: is this all we need ??
	95	*/
	96	switch (attr->va_type) {
	97	case C_VNON:
	98	inode_type = 0;
	99	break;
	100	case C_VREG:
	101	inode_type = S_IFREG;
	102	break;
	103	case C_VDIR:
	104	inode_type = S_IFDIR;
	105	break;
	106	case C_VLNK:
	107	inode_type = S_IFLNK;
	108	break;
	109	default:
	110	inode_type = 0;
	111	}
	112	inode->i_mode \|= inode_type;
	113
	114	if (attr->va_mode != (u_short) -1)
	115	inode->i_mode = attr->va_mode \| inode_type;
	116	if (attr->va_uid != -1)
d83f5901	117	inode->i_uid = make_kuid(&init_user_ns, (uid_t) attr->va_uid);
1da177e4	118	if (attr->va_gid != -1)
d83f5901	119	inode->i_gid = make_kgid(&init_user_ns, (gid_t) attr->va_gid);
1da177e4	120	if (attr->va_nlink != -1)
bfe86848	121	set_nlink(inode, attr->va_nlink);
1da177e4 LT	122	if (attr->va_size != -1)
1da177e4 LT	123	inode->i_size = attr->va_size;
1da177e4 LT	124	if (attr->va_size != -1)
	125	inode->i_blocks = (attr->va_size + 511) >> 9;
	126	if (attr->va_atime.tv_sec != -1)
6ced9aa7	127	inode->i_atime = coda_to_timespec64(attr->va_atime);
1da177e4	128	if (attr->va_mtime.tv_sec != -1)
6ced9aa7	129	inode->i_mtime = coda_to_timespec64(attr->va_mtime);
1da177e4	130	if (attr->va_ctime.tv_sec != -1)
6ced9aa7	131	inode->i_ctime = coda_to_timespec64(attr->va_ctime);
1da177e4 LT	132	}
	133
	134
	135	/*
	136	* BSD sets attributes that need not be modified to -1.
	137	* Linux uses the valid field to indicate what should be
	138	* looked at. The BSD type field needs to be deduced from linux
	139	* mode.
	140	* So we have to do some translations here.
	141	*/
	142
	143	void coda_iattr_to_vattr(struct iattr iattr, struct coda_vattr vattr)
	144	{
	145	unsigned int valid;
	146
	147	/* clean out */
a2d416dc	148	vattr->va_mode = -1;
1da177e4 LT	149	vattr->va_uid = (vuid_t) -1;
	150	vattr->va_gid = (vgid_t) -1;
	151	vattr->va_size = (off_t) -1;
5e7c31df	152	vattr->va_atime.tv_sec = (int64_t) -1;
6ced9aa7	153	vattr->va_atime.tv_nsec = (long) -1;
5e7c31df	154	vattr->va_mtime.tv_sec = (int64_t) -1;
6ced9aa7	155	vattr->va_mtime.tv_nsec = (long) -1;
5e7c31df	156	vattr->va_ctime.tv_sec = (int64_t) -1;
6ced9aa7	157	vattr->va_ctime.tv_nsec = (long) -1;
1da177e4 LT	158	vattr->va_type = C_VNON;
	159	vattr->va_fileid = -1;
	160	vattr->va_gen = -1;
	161	vattr->va_bytes = -1;
	162	vattr->va_nlink = -1;
	163	vattr->va_blocksize = -1;
	164	vattr->va_rdev = -1;
	165	vattr->va_flags = 0;
	166
	167	/* determine the type */
	168	#if 0
	169	mode = iattr->ia_mode;
	170	if ( S_ISDIR(mode) ) {
	171	vattr->va_type = C_VDIR;
	172	} else if ( S_ISREG(mode) ) {
	173	vattr->va_type = C_VREG;
	174	} else if ( S_ISLNK(mode) ) {
	175	vattr->va_type = C_VLNK;
	176	} else {
	177	/* don't do others */
	178	vattr->va_type = C_VNON;
	179	}
	180	#endif
	181
	182	/* set those vattrs that need change */
	183	valid = iattr->ia_valid;
	184	if ( valid & ATTR_MODE ) {
	185	vattr->va_mode = iattr->ia_mode;
	186	}
	187	if ( valid & ATTR_UID ) {
d83f5901	188	vattr->va_uid = (vuid_t) from_kuid(&init_user_ns, iattr->ia_uid);
1da177e4 LT	189	}
1da177e4 LT	190	if ( valid & ATTR_GID ) {
d83f5901	191	vattr->va_gid = (vgid_t) from_kgid(&init_user_ns, iattr->ia_gid);
1da177e4 LT	192	}
	193	if ( valid & ATTR_SIZE ) {
	194	vattr->va_size = iattr->ia_size;
	195	}
	196	if ( valid & ATTR_ATIME ) {
6ced9aa7	197	vattr->va_atime = timespec64_to_coda(iattr->ia_atime);
1da177e4 LT	198	}
1da177e4 LT	199	if ( valid & ATTR_MTIME ) {
6ced9aa7	200	vattr->va_mtime = timespec64_to_coda(iattr->ia_mtime);
1da177e4 LT	201	}
1da177e4 LT	202	if ( valid & ATTR_CTIME ) {
6ced9aa7	203	vattr->va_ctime = timespec64_to_coda(iattr->ia_ctime);
1da177e4 LT	204	}
	205	}
	206