// 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); } }