2 * Copyright (c) 2001 Dag-Erling Smørgrav
3 * Copyright (c) 1993 Jan-Simon Pendry
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
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11 * modification, are permitted provided that the following conditions
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14 * notice, this list of conditions and the following disclaimer.
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18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
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38 * @(#)procfs_vfsops.c 8.7 (Berkeley) 5/10/95
43 #include <sys/param.h>
44 #include <sys/queue.h>
47 #include <sys/kernel.h>
48 #include <sys/malloc.h>
49 #include <sys/mount.h>
50 #include <sys/mutex.h>
53 #include <sys/sysproto.h>
54 #include <sys/systm.h>
55 #include <sys/vnode.h>
59 #include <vm/vm_param.h>
61 #include <fs/pseudofs/pseudofs.h>
62 #include <fs/procfs/procfs.h>
65 * Filler function for proc/pid/self
68 procfs_doprocfile(PFS_FILL_ARGS)
80 error = vn_fullpath(td, textvp, &fullpath, &freepath);
83 sbuf_printf(sb, "%s", fullpath);
85 free(freepath, M_TEMP);
90 * Filler function for proc/curproc
93 procfs_docurproc(PFS_FILL_ARGS)
95 sbuf_printf(sb, "%ld", (long)td->td_proc->p_pid);
100 * Adjust mode for some nodes that need it
103 procfs_attr(PFS_ATTR_ARGS)
106 /* XXX inefficient, split into separate functions */
107 if (strcmp(pn->pn_name, "ctl") == 0 ||
108 strcmp(pn->pn_name, "note") == 0 ||
109 strcmp(pn->pn_name, "notepg") == 0)
111 else if (strcmp(pn->pn_name, "mem") == 0 ||
112 strcmp(pn->pn_name, "regs") == 0 ||
113 strcmp(pn->pn_name, "dbregs") == 0 ||
114 strcmp(pn->pn_name, "fpregs") == 0 ||
115 strcmp(pn->pn_name, "osrel") == 0)
119 PROC_LOCK_ASSERT(p, MA_OWNED);
121 if ((p->p_flag & P_SUGID) && pn->pn_type != pfstype_procdir)
129 * Visibility: some files only exist for non-system processes
130 * Non-static because linprocfs uses it.
133 procfs_notsystem(PFS_VIS_ARGS)
135 PROC_LOCK_ASSERT(p, MA_OWNED);
136 return ((p->p_flag & P_SYSTEM) == 0);
140 * Visibility: some files are only visible to process that can debug
141 * the target process.
144 procfs_candebug(PFS_VIS_ARGS)
146 PROC_LOCK_ASSERT(p, MA_OWNED);
147 return ((p->p_flag & P_SYSTEM) == 0 && p_candebug(td, p) == 0);
154 procfs_init(PFS_INIT_ARGS)
156 struct pfs_node *root;
157 struct pfs_node *dir;
158 struct pfs_node *node;
162 pfs_create_link(root, "curproc", procfs_docurproc,
163 NULL, NULL, NULL, 0);
165 dir = pfs_create_dir(root, "pid",
166 procfs_attr, NULL, NULL, PFS_PROCDEP);
167 pfs_create_file(dir, "cmdline", procfs_doproccmdline,
168 NULL, NULL, NULL, PFS_RD);
169 pfs_create_file(dir, "ctl", procfs_doprocctl,
170 procfs_attr, NULL, NULL, PFS_WR);
171 pfs_create_file(dir, "dbregs", procfs_doprocdbregs,
172 procfs_attr, procfs_candebug, NULL, PFS_RDWR|PFS_RAW);
173 pfs_create_file(dir, "etype", procfs_doproctype,
174 NULL, NULL, NULL, PFS_RD);
175 pfs_create_file(dir, "fpregs", procfs_doprocfpregs,
176 procfs_attr, procfs_candebug, NULL, PFS_RDWR|PFS_RAW);
177 pfs_create_file(dir, "map", procfs_doprocmap,
178 NULL, procfs_notsystem, NULL, PFS_RD);
179 node = pfs_create_file(dir, "mem", procfs_doprocmem,
180 procfs_attr, procfs_candebug, NULL, PFS_RDWR|PFS_RAW);
181 node->pn_ioctl = procfs_ioctl;
182 node->pn_close = procfs_close;
183 pfs_create_file(dir, "note", procfs_doprocnote,
184 procfs_attr, procfs_candebug, NULL, PFS_WR);
185 pfs_create_file(dir, "notepg", procfs_doprocnote,
186 procfs_attr, procfs_candebug, NULL, PFS_WR);
187 pfs_create_file(dir, "regs", procfs_doprocregs,
188 procfs_attr, procfs_candebug, NULL, PFS_RDWR|PFS_RAW);
189 pfs_create_file(dir, "rlimit", procfs_doprocrlimit,
190 NULL, NULL, NULL, PFS_RD);
191 pfs_create_file(dir, "status", procfs_doprocstatus,
192 NULL, NULL, NULL, PFS_RD);
193 pfs_create_file(dir, "osrel", procfs_doosrel,
194 procfs_attr, procfs_candebug, NULL, PFS_RDWR);
196 pfs_create_link(dir, "file", procfs_doprocfile,
197 NULL, procfs_notsystem, NULL, 0);
206 procfs_uninit(PFS_INIT_ARGS)
208 /* nothing to do, pseudofs will GC */
212 PSEUDOFS(procfs, 1, PR_ALLOW_MOUNT_PROCFS);