1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 29 #include <fs/fs_subr.h> 30 31 #include <sys/errno.h> 32 #include <sys/kmem.h> 33 #include <sys/modctl.h> 34 #include <sys/objfs.h> 35 #include <sys/objfs_impl.h> 36 #include <sys/vfs_opreg.h> 37 #include <sys/systm.h> 38 39 extern int last_module_id; 40 41 static int objfs_root_do_lookup(vnode_t *, const char *, vnode_t **, ino64_t *, 42 cred_t *); 43 static int objfs_root_do_readdir(vnode_t *, void *, int *, 44 offset_t *, offset_t *, void *, int); 45 46 vnode_t * 47 objfs_create_root(vfs_t *vfsp) 48 { 49 vnode_t *vp = gfs_root_create(sizeof (objfs_rootnode_t), vfsp, 50 objfs_ops_root, OBJFS_INO_ROOT, NULL, NULL, OBJFS_NAME_MAX, 51 objfs_root_do_readdir, objfs_root_do_lookup); 52 53 return (vp); 54 } 55 56 /* ARGSUSED */ 57 static int 58 objfs_root_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 59 caller_context_t *ct) 60 { 61 vap->va_type = VDIR; 62 vap->va_mode = 0555; 63 vap->va_nodeid = gfs_file_inode(vp); 64 vap->va_nlink = objfs_nobjs() + 2; 65 vap->va_size = vap->va_nlink; 66 vap->va_atime.tv_sec = vp->v_vfsp->vfs_mtime; 67 vap->va_atime.tv_nsec = 0; 68 vap->va_mtime = vap->va_ctime = vap->va_atime; 69 return (objfs_common_getattr(vp, vap)); 70 } 71 72 /* ARGSUSED */ 73 static int 74 objfs_root_do_lookup(vnode_t *vp, const char *nm, vnode_t **vpp, ino64_t *inop, 75 cred_t *cr) 76 { 77 int result = ENOENT; 78 struct modctl *mp; 79 80 /* 81 * Run through all the loaded modules on the system looking for 82 * a matching module name. 83 */ 84 mutex_enter(&mod_lock); 85 mp = &modules; 86 do { 87 if (mp->mod_loaded && 88 strcmp(nm, mp->mod_modname) == 0) { 89 /* 90 * We drop mod_lock in order to do allocations, 91 * as modctls are persistent. 92 */ 93 mutex_exit(&mod_lock); 94 *vpp = objfs_create_odirnode(vp, mp); 95 *inop = OBJFS_INO_ODIR(mp->mod_id); 96 mutex_enter(&mod_lock); 97 result = 0; 98 break; 99 } 100 } while ((mp = mp->mod_next) != &modules); 101 mutex_exit(&mod_lock); 102 103 return (result); 104 } 105 106 /* ARGSUSED */ 107 int 108 objfs_root_do_readdir(vnode_t *vp, void *dp, int *eofp, 109 offset_t *offp, offset_t *nextp, void *data, int flags) 110 { 111 struct modctl **mpp = data; 112 struct modctl *mp = *mpp; 113 struct dirent64 *odp = dp; 114 115 /* objfs does not support V_RDDIR_ENTFLAGS */ 116 if (flags & V_RDDIR_ENTFLAGS) 117 return (ENOTSUP); 118 119 mutex_enter(&mod_lock); 120 121 /* Check for EOF */ 122 if (*offp >= last_module_id) { 123 *eofp = 1; 124 mutex_exit(&mod_lock); 125 return (0); 126 } 127 128 /* 129 * Find the appropriate modctl 130 */ 131 while (mp->mod_id < *offp) { 132 mp = mp->mod_next; 133 ASSERT(mp != &modules); 134 } 135 136 while (!mp->mod_loaded && mp != &modules) 137 mp = mp->mod_next; 138 139 if (mp == &modules && *offp != 0) { 140 *eofp = 1; 141 mutex_exit(&mod_lock); 142 return (0); 143 } 144 145 /* 146 * The modctl will not change, as they are persistent. 147 */ 148 mutex_exit(&mod_lock); 149 150 (void) strncpy(odp->d_name, mp->mod_modname, OBJFS_NAME_MAX); 151 odp->d_ino = OBJFS_INO_ODIR(mp->mod_id); 152 *offp = mp->mod_id; 153 *nextp = mp->mod_id + 1; 154 155 return (0); 156 } 157 158 /* ARGSUSED */ 159 static int 160 objfs_root_readdir(vnode_t *vp, uio_t *uiop, cred_t *cr, int *eofp, 161 caller_context_t *ct, int flags) 162 { 163 struct modctl *mp = &modules; 164 165 return (gfs_dir_readdir(vp, uiop, eofp, &mp, cr, ct, flags)); 166 } 167 168 const fs_operation_def_t objfs_tops_root[] = { 169 { VOPNAME_OPEN, { .vop_open = objfs_dir_open } }, 170 { VOPNAME_CLOSE, { .vop_close = objfs_common_close } }, 171 { VOPNAME_IOCTL, { .error = fs_inval } }, 172 { VOPNAME_GETATTR, { .vop_getattr = objfs_root_getattr } }, 173 { VOPNAME_ACCESS, { .vop_access = objfs_dir_access } }, 174 { VOPNAME_READDIR, { .vop_readdir = objfs_root_readdir } }, 175 { VOPNAME_LOOKUP, { .vop_lookup = gfs_vop_lookup } }, 176 { VOPNAME_SEEK, { .vop_seek = fs_seek } }, 177 { VOPNAME_INACTIVE, { .vop_inactive = gfs_vop_inactive } }, 178 { NULL } 179 }; 180