[net-next-2.6.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_linux.h>
#include <linux/coda_psdev.h>
#include <linux/coda_fs_i.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 = (uid_t) attr->va_uid;
        if (attr->va_gid != -1)
	        inode->i_gid = (gid_t) attr->va_gid;
	if (attr->va_nlink != -1)
	        inode->i_nlink = 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) iattr->ia_uid;
	}
        if ( valid & ATTR_GID ) {
                vattr->va_gid = (vgid_t) 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>
	20	#include <linux/coda_linux.h>
	21	#include <linux/coda_psdev.h>
	22	#include <linux/coda_fs_i.h>
	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
	44	/* recognize /coda inode */
	45	int coda_isroot(struct inode *i)
	46	{
	47	return ( i->i_sb->s_root->d_inode == i );
	48	}
	49
	50	unsigned short coda_flags_to_cflags(unsigned short flags)
	51	{
	52	unsigned short coda_flags = 0;
	53
	54	if ((flags & O_ACCMODE) == O_RDONLY)
	55	coda_flags \|= C_O_READ;
	56
	57	if ((flags & O_ACCMODE) == O_RDWR)
	58	coda_flags \|= C_O_READ \| C_O_WRITE;
	59
	60	if ((flags & O_ACCMODE) == O_WRONLY)
	61	coda_flags \|= C_O_WRITE;
	62
	63	if (flags & O_TRUNC)
	64	coda_flags \|= C_O_TRUNC;
	65
	66	if (flags & O_CREAT)
	67	coda_flags \|= C_O_CREAT;
	68
	69	if (flags & O_EXCL)
	70	coda_flags \|= C_O_EXCL;
	71
	72	return coda_flags;
	73	}
	74
	75
	76	/* utility functions below */
	77	void coda_vattr_to_iattr(struct inode inode, struct coda_vattr attr)
	78	{
	79	int inode_type;
	80	/* inode's i_flags, i_ino are set by iget
	81	XXX: is this all we need ??
	82	*/
	83	switch (attr->va_type) {
	84	case C_VNON:
	85	inode_type = 0;
	86	break;
	87	case C_VREG:
	88	inode_type = S_IFREG;
	89	break;
	90	case C_VDIR:
	91	inode_type = S_IFDIR;
	92	break;
	93	case C_VLNK:
	94	inode_type = S_IFLNK;
	95	break;
	96	default:
	97	inode_type = 0;
98	}
99	inode->i_mode \|= inode_type;
100
101	if (attr->va_mode != (u_short) -1)
102	inode->i_mode = attr->va_mode \| inode_type;
103	if (attr->va_uid != -1)
104	inode->i_uid = (uid_t) attr->va_uid;
105	if (attr->va_gid != -1)
106	inode->i_gid = (gid_t) attr->va_gid;
107	if (attr->va_nlink != -1)
108	inode->i_nlink = attr->va_nlink;
109	if (attr->va_size != -1)
110	inode->i_size = attr->va_size;
1da177e4 LT	111	if (attr->va_size != -1)
	112	inode->i_blocks = (attr->va_size + 511) >> 9;
	113	if (attr->va_atime.tv_sec != -1)
	114	inode->i_atime = attr->va_atime;
	115	if (attr->va_mtime.tv_sec != -1)
	116	inode->i_mtime = attr->va_mtime;
	117	if (attr->va_ctime.tv_sec != -1)
	118	inode->i_ctime = attr->va_ctime;
	119	}
	120
	121
	122	/*
	123	* BSD sets attributes that need not be modified to -1.
	124	* Linux uses the valid field to indicate what should be
	125	* looked at. The BSD type field needs to be deduced from linux
	126	* mode.
	127	* So we have to do some translations here.
	128	*/
	129
	130	void coda_iattr_to_vattr(struct iattr iattr, struct coda_vattr vattr)
	131	{
	132	unsigned int valid;
	133
	134	/* clean out */
a2d416dc	135	vattr->va_mode = -1;
1da177e4 LT	136	vattr->va_uid = (vuid_t) -1;
	137	vattr->va_gid = (vgid_t) -1;
	138	vattr->va_size = (off_t) -1;
	139	vattr->va_atime.tv_sec = (time_t) -1;
	140	vattr->va_atime.tv_nsec = (time_t) -1;
	141	vattr->va_mtime.tv_sec = (time_t) -1;
	142	vattr->va_mtime.tv_nsec = (time_t) -1;
	143	vattr->va_ctime.tv_sec = (time_t) -1;
	144	vattr->va_ctime.tv_nsec = (time_t) -1;
	145	vattr->va_type = C_VNON;
	146	vattr->va_fileid = -1;
	147	vattr->va_gen = -1;
	148	vattr->va_bytes = -1;
	149	vattr->va_nlink = -1;
	150	vattr->va_blocksize = -1;
	151	vattr->va_rdev = -1;
	152	vattr->va_flags = 0;
	153
	154	/* determine the type */
	155	#if 0
	156	mode = iattr->ia_mode;
	157	if ( S_ISDIR(mode) ) {
	158	vattr->va_type = C_VDIR;
	159	} else if ( S_ISREG(mode) ) {
	160	vattr->va_type = C_VREG;
	161	} else if ( S_ISLNK(mode) ) {
	162	vattr->va_type = C_VLNK;
	163	} else {
	164	/* don't do others */
	165	vattr->va_type = C_VNON;
	166	}
	167	#endif
	168
	169	/* set those vattrs that need change */
	170	valid = iattr->ia_valid;
	171	if ( valid & ATTR_MODE ) {
	172	vattr->va_mode = iattr->ia_mode;
	173	}
	174	if ( valid & ATTR_UID ) {
	175	vattr->va_uid = (vuid_t) iattr->ia_uid;
	176	}
	177	if ( valid & ATTR_GID ) {
	178	vattr->va_gid = (vgid_t) iattr->ia_gid;
	179	}
	180	if ( valid & ATTR_SIZE ) {
	181	vattr->va_size = iattr->ia_size;
	182	}
	183	if ( valid & ATTR_ATIME ) {
	184	vattr->va_atime = iattr->ia_atime;
	185	}
	186	if ( valid & ATTR_MTIME ) {
	187	vattr->va_mtime = iattr->ia_mtime;
	188	}
	189	if ( valid & ATTR_CTIME ) {
	190	vattr->va_ctime = iattr->ia_ctime;
	191	}
	192	}
	193