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 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <fs/fs_subr.h> 27 28 #include <sys/errno.h> 29 #include <sys/kmem.h> 30 #include <sys/modctl.h> 31 #include <sys/objfs.h> 32 #include <sys/objfs_impl.h> 33 #include <sys/vfs_opreg.h> 34 #include <sys/systm.h> 35 36 extern int last_module_id; 37 38 static int objfs_root_do_lookup(vnode_t *, const char *, vnode_t **, ino64_t *, 39 cred_t *, int, int *, pathname_t *); 40 static int objfs_root_do_readdir(vnode_t *, void *, int *, 41 offset_t *, offset_t *, void *, int); 42 43 vnode_t * 44 objfs_create_root(vfs_t *vfsp) 45 { 46 vnode_t *vp = gfs_root_create(sizeof (objfs_rootnode_t), vfsp, 47 objfs_ops_root, OBJFS_INO_ROOT, NULL, NULL, OBJFS_NAME_MAX, 48 objfs_root_do_readdir, objfs_root_do_lookup); 49 50 return (vp); 51 } 52 53 /* ARGSUSED */ 54 static int 55 objfs_root_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 56 caller_context_t *ct) 57 { 58 vap->va_type = VDIR; 59 vap->va_mode = 0555; 60 vap->va_nodeid = gfs_file_inode(vp); 61 vap->va_nlink = objfs_nobjs() + 2; 62 vap->va_size = vap->va_nlink; 63 vap->va_atime.tv_sec = vp->v_vfsp->vfs_mtime; 64 vap->va_atime.tv_nsec = 0; 65 vap->va_mtime = vap->va_ctime = vap->va_atime; 66 return (objfs_common_getattr(vp, vap)); 67 } 68 69 /* ARGSUSED */ 70 static int 71 objfs_root_do_lookup(vnode_t *vp, const char *nm, vnode_t **vpp, ino64_t *inop, 72 cred_t *cr, int flags, int *deflags, pathname_t *rpnp) 73 { 74 int result = ENOENT; 75 struct modctl *mp; 76 77 /* 78 * Run through all the loaded modules on the system looking for 79 * a matching module name. 80 */ 81 mutex_enter(&mod_lock); 82 mp = &modules; 83 do { 84 if (mp->mod_loaded && 85 strcmp(nm, mp->mod_modname) == 0) { 86 /* 87 * We drop mod_lock in order to do allocations, 88 * as modctls are persistent. 89 */ 90 mutex_exit(&mod_lock); 91 *vpp = objfs_create_odirnode(vp, mp); 92 *inop = OBJFS_INO_ODIR(mp->mod_id); 93 mutex_enter(&mod_lock); 94 result = 0; 95 break; 96 } 97 } while ((mp = mp->mod_next) != &modules); 98 mutex_exit(&mod_lock); 99 100 return (result); 101 } 102 103 /* ARGSUSED */ 104 int 105 objfs_root_do_readdir(vnode_t *vp, void *dp, int *eofp, 106 offset_t *offp, offset_t *nextp, void *data, int flags) 107 { 108 struct modctl **mpp = data; 109 struct modctl *mp = *mpp; 110 struct dirent64 *odp = dp; 111 112 ASSERT(!(flags & V_RDDIR_ENTFLAGS)); 113 114 mutex_enter(&mod_lock); 115 116 /* Check for EOF */ 117 if (*offp >= last_module_id) { 118 *eofp = 1; 119 mutex_exit(&mod_lock); 120 return (0); 121 } 122 123 /* 124 * Find the appropriate modctl 125 */ 126 while (mp->mod_id < *offp) { 127 mp = mp->mod_next; 128 ASSERT(mp != &modules); 129 } 130 131 while (!mp->mod_loaded && mp != &modules) 132 mp = mp->mod_next; 133 134 if (mp == &modules && *offp != 0) { 135 *eofp = 1; 136 mutex_exit(&mod_lock); 137 return (0); 138 } 139 140 /* 141 * The modctl will not change, as they are persistent. 142 */ 143 mutex_exit(&mod_lock); 144 145 (void) strncpy(odp->d_name, mp->mod_modname, OBJFS_NAME_MAX); 146 odp->d_ino = OBJFS_INO_ODIR(mp->mod_id); 147 *offp = mp->mod_id; 148 *nextp = mp->mod_id + 1; 149 150 return (0); 151 } 152 153 /* ARGSUSED */ 154 static int 155 objfs_root_readdir(vnode_t *vp, uio_t *uiop, cred_t *cr, int *eofp, 156 caller_context_t *ct, int flags) 157 { 158 struct modctl *mp = &modules; 159 160 return (gfs_dir_readdir(vp, uiop, eofp, &mp, cr, ct, flags)); 161 } 162 163 const fs_operation_def_t objfs_tops_root[] = { 164 { VOPNAME_OPEN, { .vop_open = objfs_dir_open } }, 165 { VOPNAME_CLOSE, { .vop_close = objfs_common_close } }, 166 { VOPNAME_IOCTL, { .error = fs_inval } }, 167 { VOPNAME_GETATTR, { .vop_getattr = objfs_root_getattr } }, 168 { VOPNAME_ACCESS, { .vop_access = objfs_dir_access } }, 169 { VOPNAME_READDIR, { .vop_readdir = objfs_root_readdir } }, 170 { VOPNAME_LOOKUP, { .vop_lookup = gfs_vop_lookup } }, 171 { VOPNAME_SEEK, { .vop_seek = fs_seek } }, 172 { VOPNAME_INACTIVE, { .vop_inactive = gfs_vop_inactive } }, 173 { NULL } 174 }; 175