[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / coda / coda_linux.c

/*
 * 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 <asm/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));
}

/* recognize /coda inode */
int coda_isroot(struct inode *i)
{
    return ( i->i_sb->s_root->d_inode == i );
}

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
1da177e4 LT	1	/*
	2	* Inode operations for Coda filesystem
	3	* Original version: (C) 1996 P. Braam and M. Callahan
	4	* Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
	5	*
	6	* Carnegie Mellon encourages users to contribute improvements to
	7	* the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
	8	*/
	9
	10	#include <linux/types.h>
	11	#include <linux/kernel.h>
	12	#include <linux/time.h>
	13	#include <linux/fs.h>
	14	#include <linux/stat.h>
	15	#include <linux/errno.h>
	16	#include <asm/uaccess.h>
	17	#include <linux/string.h>
	18
	19	#include <linux/coda.h>
1da177e4	20	#include <linux/coda_psdev.h>
31a203df	21	#include "coda_linux.h"
1da177e4 LT	22
	23	/* initialize the debugging variables */
	24	int coda_fake_statfs;
	25
	26	/* print a fid */
	27	char * coda_f2s(struct CodaFid *f)
	28	{
	29	static char s[60];
de0ca06a	30
1da177e4	31	sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]);
de0ca06a	32
1da177e4 LT	33	return s;
	34	}
	35
	36	/* recognize special .CONTROL name */
	37	int coda_iscontrol(const char *name, size_t length)
	38	{
	39	return ((CODA_CONTROLLEN == length) &&
	40	(strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0));
	41	}
	42
	43	/* recognize /coda inode */
	44	int coda_isroot(struct inode *i)
	45	{
	46	return ( i->i_sb->s_root->d_inode == i );
	47	}
	48
	49	unsigned short coda_flags_to_cflags(unsigned short flags)
	50	{
	51	unsigned short coda_flags = 0;
	52
	53	if ((flags & O_ACCMODE) == O_RDONLY)
	54	coda_flags \|= C_O_READ;
	55
	56	if ((flags & O_ACCMODE) == O_RDWR)
	57	coda_flags \|= C_O_READ \| C_O_WRITE;
	58
	59	if ((flags & O_ACCMODE) == O_WRONLY)
	60	coda_flags \|= C_O_WRITE;
	61
	62	if (flags & O_TRUNC)
	63	coda_flags \|= C_O_TRUNC;
	64
	65	if (flags & O_CREAT)
	66	coda_flags \|= C_O_CREAT;
	67
	68	if (flags & O_EXCL)
	69	coda_flags \|= C_O_EXCL;
	70
	71	return coda_flags;
	72	}
	73
	74
	75	/* utility functions below */
	76	void coda_vattr_to_iattr(struct inode inode, struct coda_vattr attr)
	77	{
	78	int inode_type;
	79	/* inode's i_flags, i_ino are set by iget
	80	XXX: is this all we need ??
	81	*/
	82	switch (attr->va_type) {
	83	case C_VNON:
	84	inode_type = 0;
	85	break;
	86	case C_VREG:
	87	inode_type = S_IFREG;
	88	break;
	89	case C_VDIR:
	90	inode_type = S_IFDIR;
	91	break;
	92	case C_VLNK:
	93	inode_type = S_IFLNK;
	94	break;
	95	default:
	96	inode_type = 0;
97	}
98	inode->i_mode \|= inode_type;
99
100	if (attr->va_mode != (u_short) -1)
101	inode->i_mode = attr->va_mode \| inode_type;
102	if (attr->va_uid != -1)
d83f5901	103	inode->i_uid = make_kuid(&init_user_ns, (uid_t) attr->va_uid);
1da177e4	104	if (attr->va_gid != -1)
d83f5901	105	inode->i_gid = make_kgid(&init_user_ns, (gid_t) attr->va_gid);
1da177e4	106	if (attr->va_nlink != -1)
bfe86848	107	set_nlink(inode, attr->va_nlink);
1da177e4 LT	108	if (attr->va_size != -1)
1da177e4 LT	109	inode->i_size = attr->va_size;
1da177e4 LT	110	if (attr->va_size != -1)
	111	inode->i_blocks = (attr->va_size + 511) >> 9;
	112	if (attr->va_atime.tv_sec != -1)
	113	inode->i_atime = attr->va_atime;
	114	if (attr->va_mtime.tv_sec != -1)
	115	inode->i_mtime = attr->va_mtime;
	116	if (attr->va_ctime.tv_sec != -1)
	117	inode->i_ctime = attr->va_ctime;
	118	}
	119
	120
	121	/*
	122	* BSD sets attributes that need not be modified to -1.
	123	* Linux uses the valid field to indicate what should be
	124	* looked at. The BSD type field needs to be deduced from linux
	125	* mode.
	126	* So we have to do some translations here.
	127	*/
	128
	129	void coda_iattr_to_vattr(struct iattr iattr, struct coda_vattr vattr)
	130	{
	131	unsigned int valid;
	132
	133	/* clean out */
a2d416dc	134	vattr->va_mode = -1;
1da177e4 LT	135	vattr->va_uid = (vuid_t) -1;
	136	vattr->va_gid = (vgid_t) -1;
	137	vattr->va_size = (off_t) -1;
	138	vattr->va_atime.tv_sec = (time_t) -1;
	139	vattr->va_atime.tv_nsec = (time_t) -1;
	140	vattr->va_mtime.tv_sec = (time_t) -1;
	141	vattr->va_mtime.tv_nsec = (time_t) -1;
	142	vattr->va_ctime.tv_sec = (time_t) -1;
	143	vattr->va_ctime.tv_nsec = (time_t) -1;
	144	vattr->va_type = C_VNON;
	145	vattr->va_fileid = -1;
	146	vattr->va_gen = -1;
	147	vattr->va_bytes = -1;
	148	vattr->va_nlink = -1;
	149	vattr->va_blocksize = -1;
	150	vattr->va_rdev = -1;
	151	vattr->va_flags = 0;
	152
	153	/* determine the type */
	154	#if 0
	155	mode = iattr->ia_mode;
	156	if ( S_ISDIR(mode) ) {
	157	vattr->va_type = C_VDIR;
	158	} else if ( S_ISREG(mode) ) {
	159	vattr->va_type = C_VREG;
	160	} else if ( S_ISLNK(mode) ) {
	161	vattr->va_type = C_VLNK;
	162	} else {
	163	/* don't do others */
	164	vattr->va_type = C_VNON;
	165	}
	166	#endif
	167
	168	/* set those vattrs that need change */
	169	valid = iattr->ia_valid;
	170	if ( valid & ATTR_MODE ) {
	171	vattr->va_mode = iattr->ia_mode;
	172	}
	173	if ( valid & ATTR_UID ) {
d83f5901	174	vattr->va_uid = (vuid_t) from_kuid(&init_user_ns, iattr->ia_uid);
1da177e4 LT	175	}
1da177e4 LT	176	if ( valid & ATTR_GID ) {
d83f5901	177	vattr->va_gid = (vgid_t) from_kgid(&init_user_ns, iattr->ia_gid);
1da177e4 LT	178	}
	179	if ( valid & ATTR_SIZE ) {
	180	vattr->va_size = iattr->ia_size;
	181	}
	182	if ( valid & ATTR_ATIME ) {
	183	vattr->va_atime = iattr->ia_atime;
	184	}
	185	if ( valid & ATTR_MTIME ) {
	186	vattr->va_mtime = iattr->ia_mtime;
	187	}
	188	if ( valid & ATTR_CTIME ) {
	189	vattr->va_ctime = iattr->ia_ctime;
	190	}
	191	}
	192