Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Inode operations for Coda filesystem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Original version: (C) 1996 P. Braam and M. Callahan
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Carnegie Mellon encourages users to contribute improvements to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/coda.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include "coda_psdev.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include "coda_linux.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) /* initialize the debugging variables */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) int coda_fake_statfs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) /* print a fid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) char * coda_f2s(struct CodaFid *f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	static char s[60];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32)  	sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	return s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) /* recognize special .CONTROL name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) int coda_iscontrol(const char *name, size_t length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	return ((CODA_CONTROLLEN == length) && 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)                 (strncmp(name, CODA_CONTROL, CODA_CONTROLLEN) == 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) unsigned short coda_flags_to_cflags(unsigned short flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	unsigned short coda_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	if ((flags & O_ACCMODE) == O_RDONLY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		coda_flags |= C_O_READ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	if ((flags & O_ACCMODE) == O_RDWR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		coda_flags |= C_O_READ | C_O_WRITE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	if ((flags & O_ACCMODE) == O_WRONLY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		coda_flags |= C_O_WRITE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	if (flags & O_TRUNC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		coda_flags |= C_O_TRUNC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	if (flags & O_CREAT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		coda_flags |= C_O_CREAT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	if (flags & O_EXCL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		coda_flags |= C_O_EXCL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	return coda_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) static struct timespec64 coda_to_timespec64(struct coda_timespec ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	struct timespec64 ts64 = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		.tv_sec = ts.tv_sec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		.tv_nsec = ts.tv_nsec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	return ts64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) static struct coda_timespec timespec64_to_coda(struct timespec64 ts64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	struct coda_timespec ts = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		.tv_sec = ts64.tv_sec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		.tv_nsec = ts64.tv_nsec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	return ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) /* utility functions below */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92)         int inode_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93)         /* inode's i_flags, i_ino are set by iget 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94)            XXX: is this all we need ??
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95)            */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96)         switch (attr->va_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97)         case C_VNON:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98)                 inode_type  = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99)                 break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)         case C_VREG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)                 inode_type = S_IFREG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)                 break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)         case C_VDIR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)                 inode_type = S_IFDIR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)                 break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)         case C_VLNK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)                 inode_type = S_IFLNK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)                 break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)         default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)                 inode_type = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)         }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	inode->i_mode |= inode_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	if (attr->va_mode != (u_short) -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	        inode->i_mode = attr->va_mode | inode_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)         if (attr->va_uid != -1) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	        inode->i_uid = make_kuid(&init_user_ns, (uid_t) attr->va_uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)         if (attr->va_gid != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	        inode->i_gid = make_kgid(&init_user_ns, (gid_t) attr->va_gid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	if (attr->va_nlink != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		set_nlink(inode, attr->va_nlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	if (attr->va_size != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	        inode->i_size = attr->va_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	if (attr->va_size != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		inode->i_blocks = (attr->va_size + 511) >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	if (attr->va_atime.tv_sec != -1) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		inode->i_atime = coda_to_timespec64(attr->va_atime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	if (attr->va_mtime.tv_sec != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		inode->i_mtime = coda_to_timespec64(attr->va_mtime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)         if (attr->va_ctime.tv_sec != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		inode->i_ctime = coda_to_timespec64(attr->va_ctime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) /* 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)  * BSD sets attributes that need not be modified to -1. 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)  * Linux uses the valid field to indicate what should be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)  * looked at.  The BSD type field needs to be deduced from linux 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)  * mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)  * So we have to do some translations here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)         unsigned int valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)         /* clean out */        
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	vattr->va_mode = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)         vattr->va_uid = (vuid_t) -1; 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)         vattr->va_gid = (vgid_t) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)         vattr->va_size = (off_t) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	vattr->va_atime.tv_sec = (int64_t) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	vattr->va_atime.tv_nsec = (long) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	vattr->va_mtime.tv_sec = (int64_t) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	vattr->va_mtime.tv_nsec = (long) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	vattr->va_ctime.tv_sec = (int64_t) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	vattr->va_ctime.tv_nsec = (long) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)         vattr->va_type = C_VNON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	vattr->va_fileid = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	vattr->va_gen = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	vattr->va_bytes = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	vattr->va_nlink = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	vattr->va_blocksize = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	vattr->va_rdev = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)         vattr->va_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)         /* determine the type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) #if 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)         mode = iattr->ia_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)                 if ( S_ISDIR(mode) ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)                 vattr->va_type = C_VDIR; 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)         } else if ( S_ISREG(mode) ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)                 vattr->va_type = C_VREG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)         } else if ( S_ISLNK(mode) ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)                 vattr->va_type = C_VLNK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)         } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)                 /* don't do others */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)                 vattr->va_type = C_VNON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)         }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) #endif 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)         /* set those vattrs that need change */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)         valid = iattr->ia_valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)         if ( valid & ATTR_MODE ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)                 vattr->va_mode = iattr->ia_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)         if ( valid & ATTR_UID ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)                 vattr->va_uid = (vuid_t) from_kuid(&init_user_ns, iattr->ia_uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)         if ( valid & ATTR_GID ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)                 vattr->va_gid = (vgid_t) from_kgid(&init_user_ns, iattr->ia_gid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)         if ( valid & ATTR_SIZE ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)                 vattr->va_size = iattr->ia_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)         if ( valid & ATTR_ATIME ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		vattr->va_atime = timespec64_to_coda(iattr->ia_atime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)         if ( valid & ATTR_MTIME ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		vattr->va_mtime = timespec64_to_coda(iattr->ia_mtime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)         if ( valid & ATTR_CTIME ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		vattr->va_ctime = timespec64_to_coda(iattr->ia_ctime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)