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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 | // 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 */ umode_t coda_inode_type(struct coda_vattr *attr) { switch (attr->va_type) { case C_VREG: return S_IFREG; case C_VDIR: return S_IFDIR; case C_VLNK: return S_IFLNK; case C_VNON: default: return 0; } } void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr) { /* inode's i_flags, i_ino are set by iget * XXX: is this all we need ?? */ umode_t inode_type = coda_inode_type(attr); 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); } } |