/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2018, Joyent, Inc. * Copyright (c) 2017 by Delphix. All rights reserved. * Copyright 2020 OmniOS Community Edition (OmniOSce) Association. */ /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ /* All Rights Reserved */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(__sparc) #include #endif #if defined(__x86) #include #endif /* * Created by prinit. */ vnodeops_t *prvnodeops; /* * Directory characteristics (patterned after the s5 file system). */ #define PRROOTINO 2 #define PRDIRSIZE 14 struct prdirect { ushort_t d_ino; char d_name[PRDIRSIZE]; }; #define PRSDSIZE (sizeof (struct prdirect)) /* * Directory characteristics. */ typedef struct prdirent { ino64_t d_ino; /* "inode number" of entry */ off64_t d_off; /* offset of disk directory entry */ unsigned short d_reclen; /* length of this record */ char d_name[14]; /* name of file */ } prdirent_t; /* * Contents of a /proc/ directory. * Reuse d_ino field for the /proc file type. */ static prdirent_t piddir[] = { { PR_PIDDIR, 1 * sizeof (prdirent_t), sizeof (prdirent_t), "." }, { PR_PROCDIR, 2 * sizeof (prdirent_t), sizeof (prdirent_t), ".." }, { PR_AS, 3 * sizeof (prdirent_t), sizeof (prdirent_t), "as" }, { PR_CTL, 4 * sizeof (prdirent_t), sizeof (prdirent_t), "ctl" }, { PR_STATUS, 5 * sizeof (prdirent_t), sizeof (prdirent_t), "status" }, { PR_LSTATUS, 6 * sizeof (prdirent_t), sizeof (prdirent_t), "lstatus" }, { PR_PSINFO, 7 * sizeof (prdirent_t), sizeof (prdirent_t), "psinfo" }, { PR_LPSINFO, 8 * sizeof (prdirent_t), sizeof (prdirent_t), "lpsinfo" }, { PR_MAP, 9 * sizeof (prdirent_t), sizeof (prdirent_t), "map" }, { PR_RMAP, 10 * sizeof (prdirent_t), sizeof (prdirent_t), "rmap" }, { PR_XMAP, 11 * sizeof (prdirent_t), sizeof (prdirent_t), "xmap" }, { PR_CRED, 12 * sizeof (prdirent_t), sizeof (prdirent_t), "cred" }, { PR_SIGACT, 13 * sizeof (prdirent_t), sizeof (prdirent_t), "sigact" }, { PR_AUXV, 14 * sizeof (prdirent_t), sizeof (prdirent_t), "auxv" }, { PR_USAGE, 15 * sizeof (prdirent_t), sizeof (prdirent_t), "usage" }, { PR_LUSAGE, 16 * sizeof (prdirent_t), sizeof (prdirent_t), "lusage" }, { PR_PAGEDATA, 17 * sizeof (prdirent_t), sizeof (prdirent_t), "pagedata" }, { PR_WATCH, 18 * sizeof (prdirent_t), sizeof (prdirent_t), "watch" }, { PR_CURDIR, 19 * sizeof (prdirent_t), sizeof (prdirent_t), "cwd" }, { PR_ROOTDIR, 20 * sizeof (prdirent_t), sizeof (prdirent_t), "root" }, { PR_FDDIR, 21 * sizeof (prdirent_t), sizeof (prdirent_t), "fd" }, { PR_FDINFODIR, 22 * sizeof (prdirent_t), sizeof (prdirent_t), "fdinfo" }, { PR_OBJECTDIR, 23 * sizeof (prdirent_t), sizeof (prdirent_t), "object" }, { PR_LWPDIR, 24 * sizeof (prdirent_t), sizeof (prdirent_t), "lwp" }, { PR_PRIV, 25 * sizeof (prdirent_t), sizeof (prdirent_t), "priv" }, { PR_PATHDIR, 26 * sizeof (prdirent_t), sizeof (prdirent_t), "path" }, { PR_CTDIR, 27 * sizeof (prdirent_t), sizeof (prdirent_t), "contracts" }, { PR_SECFLAGS, 28 * sizeof (prdirent_t), sizeof (prdirent_t), "secflags" }, #if defined(__x86) { PR_LDT, 29 * sizeof (prdirent_t), sizeof (prdirent_t), "ldt" }, #endif }; #define NPIDDIRFILES (sizeof (piddir) / sizeof (piddir[0]) - 2) /* * Contents of a /proc//lwp/ directory. */ static prdirent_t lwpiddir[] = { { PR_LWPIDDIR, 1 * sizeof (prdirent_t), sizeof (prdirent_t), "." }, { PR_LWPDIR, 2 * sizeof (prdirent_t), sizeof (prdirent_t), ".." }, { PR_LWPCTL, 3 * sizeof (prdirent_t), sizeof (prdirent_t), "lwpctl" }, { PR_LWPNAME, 4 * sizeof (prdirent_t), sizeof (prdirent_t), "lwpname" }, { PR_LWPSTATUS, 5 * sizeof (prdirent_t), sizeof (prdirent_t), "lwpstatus" }, { PR_LWPSINFO, 6 * sizeof (prdirent_t), sizeof (prdirent_t), "lwpsinfo" }, { PR_LWPUSAGE, 7 * sizeof (prdirent_t), sizeof (prdirent_t), "lwpusage" }, { PR_XREGS, 8 * sizeof (prdirent_t), sizeof (prdirent_t), "xregs" }, { PR_TMPLDIR, 9 * sizeof (prdirent_t), sizeof (prdirent_t), "templates" }, { PR_SPYMASTER, 10 * sizeof (prdirent_t), sizeof (prdirent_t), "spymaster" }, #if defined(__sparc) { PR_GWINDOWS, 11 * sizeof (prdirent_t), sizeof (prdirent_t), "gwindows" }, { PR_ASRS, 12 * sizeof (prdirent_t), sizeof (prdirent_t), "asrs" }, #endif }; #define NLWPIDDIRFILES (sizeof (lwpiddir) / sizeof (lwpiddir[0]) - 2) /* * Span of entries in the array files (lstatus, lpsinfo, lusage). * We make the span larger than the size of the structure on purpose, * to make sure that programs cannot use the structure size by mistake. * Align _ILP32 structures at 8 bytes, _LP64 structures at 16 bytes. */ #ifdef _LP64 #define LSPAN(type) (round16(sizeof (type)) + 16) #define LSPAN32(type) (round8(sizeof (type)) + 8) #else #define LSPAN(type) (round8(sizeof (type)) + 8) #endif static void rebuild_objdir(struct as *); static void prfreecommon(prcommon_t *); static int praccess(vnode_t *, int, int, cred_t *, caller_context_t *); static int propen(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct) { vnode_t *vp = *vpp; prnode_t *pnp = VTOP(vp); prcommon_t *pcp = pnp->pr_pcommon; prnodetype_t type = pnp->pr_type; vnode_t *rvp; vtype_t vtype; proc_t *p; int error = 0; prnode_t *npnp = NULL; /* * Nothing to do for the /proc directory itself. */ if (type == PR_PROCDIR) return (0); /* * If we are opening an underlying mapped object, reject opens * for writing regardless of the objects's access modes. * If we are opening a file in the /proc/pid/fd directory, * reject the open for any but a regular file or directory. * Just do it if we are opening the current or root directory. */ switch (type) { case PR_OBJECT: case PR_FD: case PR_CURDIR: case PR_ROOTDIR: rvp = pnp->pr_realvp; vtype = rvp->v_type; if ((type == PR_OBJECT && (flag & FWRITE)) || (type == PR_FD && vtype != VREG && vtype != VDIR)) error = EACCES; else { /* * Need to hold rvp since VOP_OPEN() may release it. */ VN_HOLD(rvp); error = VOP_OPEN(&rvp, flag, cr, ct); if (error) { VN_RELE(rvp); } else { *vpp = rvp; VN_RELE(vp); } } return (error); default: break; } /* * If we are opening the pagedata file, allocate a prnode now * to avoid calling kmem_alloc() while holding p->p_lock. */ if (type == PR_PAGEDATA || type == PR_OPAGEDATA) npnp = prgetnode(vp, type); /* * If the process exists, lock it now. * Otherwise we have a race condition with prclose(). */ p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) { if (npnp != NULL) prfreenode(npnp); return (ENOENT); } ASSERT(p == pcp->prc_proc); ASSERT(p->p_proc_flag & P_PR_LOCK); /* * Maintain a count of opens for write. Allow exactly one * O_WRITE|O_EXCL request and fail subsequent ones. * Don't fail opens of old (bletch!) /proc lwp files. * Special case for open by the process itself: * Always allow the open by self and discount this * open for other opens for writing. */ if (flag & FWRITE) { if (p == curproc) { pcp->prc_selfopens++; pnp->pr_flags |= PR_ISSELF; } else if (type == PR_LWPIDFILE) { /* EMPTY */; } else if (flag & FEXCL) { if (pcp->prc_writers > pcp->prc_selfopens) { error = EBUSY; goto out; } /* semantic for old /proc interface */ if (type == PR_PIDDIR) pcp->prc_flags |= PRC_EXCL; } else if (pcp->prc_flags & PRC_EXCL) { ASSERT(pcp->prc_writers > pcp->prc_selfopens); error = secpolicy_proc_excl_open(cr); if (error) goto out; } pcp->prc_writers++; /* * The vnode may have become invalid between the * VOP_LOOKUP() of the /proc vnode and the VOP_OPEN(). * If so, do now what prinvalidate() should have done. */ if ((pnp->pr_flags & PR_INVAL) || (type == PR_PIDDIR && (VTOP(pnp->pr_pidfile)->pr_flags & PR_INVAL))) { if (p != curproc) pcp->prc_selfopens++; ASSERT(pcp->prc_selfopens <= pcp->prc_writers); if (pcp->prc_selfopens == pcp->prc_writers) pcp->prc_flags &= ~PRC_EXCL; } } /* * If this is a large file open, indicate that in our flags -- some * procfs structures are not off_t-neutral (e.g., priovec_t), and * the open will need to be differentiated where 32-bit processes * pass these structures across the user/kernel boundary. */ if (flag & FOFFMAX) pnp->pr_flags |= PR_OFFMAX; /* * Do file-specific things. */ switch (type) { default: break; case PR_PAGEDATA: case PR_OPAGEDATA: /* * Enable data collection for page data file; * get unique id from the hat layer. */ { int id; /* * Drop p->p_lock to call hat_startstat() */ mutex_exit(&p->p_lock); if ((p->p_flag & SSYS) || p->p_as == &kas || (id = hat_startstat(p->p_as)) == -1) { mutex_enter(&p->p_lock); error = ENOMEM; } else if (pnp->pr_hatid == 0) { mutex_enter(&p->p_lock); pnp->pr_hatid = (uint_t)id; } else { mutex_enter(&p->p_lock); /* * Use our newly allocated prnode. */ npnp->pr_hatid = (uint_t)id; /* * prgetnode() initialized most of the prnode. * Duplicate the remainder. */ npnp->pr_ino = pnp->pr_ino; npnp->pr_common = pnp->pr_common; npnp->pr_pcommon = pnp->pr_pcommon; npnp->pr_parent = pnp->pr_parent; VN_HOLD(npnp->pr_parent); npnp->pr_index = pnp->pr_index; npnp->pr_next = p->p_plist; p->p_plist = PTOV(npnp); VN_RELE(PTOV(pnp)); pnp = npnp; npnp = NULL; *vpp = PTOV(pnp); } } break; } out: prunlock(pnp); if (npnp != NULL) prfreenode(npnp); return (error); } /* ARGSUSED */ static int prclose(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr, caller_context_t *ct) { prnode_t *pnp = VTOP(vp); prcommon_t *pcp = pnp->pr_pcommon; prnodetype_t type = pnp->pr_type; proc_t *p; kthread_t *t; user_t *up; /* * Nothing to do for the /proc directory itself. */ if (type == PR_PROCDIR) return (0); ASSERT(type != PR_OBJECT && type != PR_FD && type != PR_CURDIR && type != PR_ROOTDIR); /* * If the process exists, lock it now. * Otherwise we have a race condition with propen(). * Hold pr_pidlock across the reference to prc_selfopens, * and prc_writers in case there is no process anymore, * to cover the case of concurrent calls to prclose() * after the process has been reaped by freeproc(). */ p = pr_p_lock(pnp); /* * There is nothing more to do until the last close of * the file table entry except to clear the pr_owner * field of the prnode and notify any waiters * (their file descriptor may have just been closed). */ if (count > 1) { mutex_exit(&pr_pidlock); if (pnp->pr_owner == curproc && !fisopen(vp)) pnp->pr_owner = NULL; if (p != NULL) { prnotify(vp); prunlock(pnp); } return (0); } /* * Decrement the count of self-opens for writing. * Decrement the total count of opens for writing. * Cancel exclusive opens when only self-opens remain. */ if (flag & FWRITE) { /* * prc_selfopens also contains the count of * invalid writers. See prinvalidate(). */ if ((pnp->pr_flags & (PR_ISSELF|PR_INVAL)) || (type == PR_PIDDIR && (VTOP(pnp->pr_pidfile)->pr_flags & PR_INVAL))) { ASSERT(pcp->prc_selfopens != 0); --pcp->prc_selfopens; } ASSERT(pcp->prc_writers != 0); if (--pcp->prc_writers == pcp->prc_selfopens) pcp->prc_flags &= ~PRC_EXCL; } ASSERT(pcp->prc_writers >= pcp->prc_selfopens); mutex_exit(&pr_pidlock); if (pnp->pr_owner == curproc && !fisopen(vp)) pnp->pr_owner = NULL; /* * If there is no process, there is nothing more to do. */ if (p == NULL) return (0); ASSERT(p == pcp->prc_proc); prnotify(vp); /* notify waiters */ /* * Do file-specific things. */ switch (type) { default: break; case PR_PAGEDATA: case PR_OPAGEDATA: /* * This is a page data file. * Free the hat level statistics. * Drop p->p_lock before calling hat_freestat(). */ mutex_exit(&p->p_lock); if (p->p_as != &kas && pnp->pr_hatid != 0) hat_freestat(p->p_as, pnp->pr_hatid); mutex_enter(&p->p_lock); pnp->pr_hatid = 0; break; } /* * On last close of all writable file descriptors, * perform run-on-last-close and/or kill-on-last-close logic. * Can't do this is the /proc agent lwp still exists. */ if (pcp->prc_writers == 0 && p->p_agenttp == NULL && !(pcp->prc_flags & PRC_DESTROY) && p->p_stat != SZOMB && (p->p_proc_flag & (P_PR_RUNLCL|P_PR_KILLCL))) { int killproc; /* * Cancel any watchpoints currently in effect. * The process might disappear during this operation. */ if (pr_cancel_watch(pnp) == NULL) return (0); /* * If any tracing flags are set, clear them. */ if (p->p_proc_flag & P_PR_TRACE) { up = PTOU(p); premptyset(&up->u_entrymask); premptyset(&up->u_exitmask); up->u_systrap = 0; } premptyset(&p->p_sigmask); premptyset(&p->p_fltmask); killproc = (p->p_proc_flag & P_PR_KILLCL); p->p_proc_flag &= ~(P_PR_RUNLCL|P_PR_KILLCL|P_PR_TRACE); /* * Cancel any outstanding single-step requests. */ if ((t = p->p_tlist) != NULL) { /* * Drop p_lock because prnostep() touches the stack. * The loop is safe because the process is P_PR_LOCK'd. */ mutex_exit(&p->p_lock); do { prnostep(ttolwp(t)); } while ((t = t->t_forw) != p->p_tlist); mutex_enter(&p->p_lock); } /* * Set runnable all lwps stopped by /proc. */ if (killproc) sigtoproc(p, NULL, SIGKILL); else allsetrun(p); } prunlock(pnp); return (0); } /* * Array of read functions, indexed by /proc file type. */ static int pr_read_inval(), pr_read_as(), pr_read_status(), pr_read_lstatus(), pr_read_psinfo(), pr_read_lpsinfo(), pr_read_map(), pr_read_rmap(), pr_read_xmap(), pr_read_cred(), pr_read_sigact(), pr_read_auxv(), #if defined(__x86) pr_read_ldt(), #endif pr_read_usage(), pr_read_lusage(), pr_read_pagedata(), pr_read_watch(), pr_read_lwpstatus(), pr_read_lwpsinfo(), pr_read_lwpusage(), pr_read_lwpname(), pr_read_xregs(), pr_read_priv(), pr_read_spymaster(), pr_read_secflags(), #if defined(__sparc) pr_read_gwindows(), pr_read_asrs(), #endif pr_read_piddir(), pr_read_pidfile(), pr_read_opagedata(), pr_read_fdinfo(); static int (*pr_read_function[PR_NFILES])() = { pr_read_inval, /* /proc */ pr_read_inval, /* /proc/self */ pr_read_piddir, /* /proc/ (old /proc read()) */ pr_read_as, /* /proc//as */ pr_read_inval, /* /proc//ctl */ pr_read_status, /* /proc//status */ pr_read_lstatus, /* /proc//lstatus */ pr_read_psinfo, /* /proc//psinfo */ pr_read_lpsinfo, /* /proc//lpsinfo */ pr_read_map, /* /proc//map */ pr_read_rmap, /* /proc//rmap */ pr_read_xmap, /* /proc//xmap */ pr_read_cred, /* /proc//cred */ pr_read_sigact, /* /proc//sigact */ pr_read_auxv, /* /proc//auxv */ #if defined(__x86) pr_read_ldt, /* /proc//ldt */ #endif pr_read_usage, /* /proc//usage */ pr_read_lusage, /* /proc//lusage */ pr_read_pagedata, /* /proc//pagedata */ pr_read_watch, /* /proc//watch */ pr_read_inval, /* /proc//cwd */ pr_read_inval, /* /proc//root */ pr_read_inval, /* /proc//fd */ pr_read_inval, /* /proc//fd/nn */ pr_read_inval, /* /proc//fdinfo */ pr_read_fdinfo, /* /proc//fdinfo/nn */ pr_read_inval, /* /proc//object */ pr_read_inval, /* /proc//object/xxx */ pr_read_inval, /* /proc//lwp */ pr_read_inval, /* /proc//lwp/ */ pr_read_inval, /* /proc//lwp//lwpctl */ pr_read_lwpname, /* /proc//lwp//lwpname */ pr_read_lwpstatus, /* /proc//lwp//lwpstatus */ pr_read_lwpsinfo, /* /proc//lwp//lwpsinfo */ pr_read_lwpusage, /* /proc//lwp//lwpusage */ pr_read_xregs, /* /proc//lwp//xregs */ pr_read_inval, /* /proc//lwp//templates */ pr_read_inval, /* /proc//lwp//templates/ */ pr_read_spymaster, /* /proc//lwp//spymaster */ #if defined(__sparc) pr_read_gwindows, /* /proc//lwp//gwindows */ pr_read_asrs, /* /proc//lwp//asrs */ #endif pr_read_priv, /* /proc//priv */ pr_read_inval, /* /proc//path */ pr_read_inval, /* /proc//path/xxx */ pr_read_inval, /* /proc//contracts */ pr_read_inval, /* /proc//contracts/ */ pr_read_secflags, /* /proc//secflags */ pr_read_pidfile, /* old process file */ pr_read_pidfile, /* old lwp file */ pr_read_opagedata, /* old pagedata file */ }; /* ARGSUSED */ static int pr_read_inval(prnode_t *pnp, uio_t *uiop, cred_t *cr) { /* * No read() on any /proc directory, use getdents(2) instead. * Cannot read a control file either. * An underlying mapped object file cannot get here. */ return (EINVAL); } static int pr_uioread(void *base, long count, uio_t *uiop) { int error = 0; ASSERT(count >= 0); count -= uiop->uio_offset; if (count > 0 && uiop->uio_offset >= 0) { error = uiomove((char *)base + uiop->uio_offset, count, UIO_READ, uiop); } return (error); } static int pr_read_as(prnode_t *pnp, uio_t *uiop) { int error; ASSERT(pnp->pr_type == PR_AS); if ((error = prlock(pnp, ZNO)) == 0) { proc_t *p = pnp->pr_common->prc_proc; struct as *as = p->p_as; /* * /proc I/O cannot be done to a system process. * A 32-bit process cannot read a 64-bit process. */ if ((p->p_flag & SSYS) || as == &kas) { error = 0; #ifdef _SYSCALL32_IMPL } else if (curproc->p_model == DATAMODEL_ILP32 && PROCESS_NOT_32BIT(p)) { error = EOVERFLOW; #endif } else { /* * We don't hold p_lock over an i/o operation because * that could lead to deadlock with the clock thread. */ mutex_exit(&p->p_lock); error = prusrio(p, UIO_READ, uiop, 0); mutex_enter(&p->p_lock); } prunlock(pnp); } return (error); } static int pr_read_status(prnode_t *pnp, uio_t *uiop, cred_t *cr) { pstatus_t *sp; int error; ASSERT(pnp->pr_type == PR_STATUS); /* * We kmem_alloc() the pstatus structure because * it is so big it might blow the kernel stack. */ sp = kmem_alloc(sizeof (*sp), KM_SLEEP); if ((error = prlock(pnp, ZNO)) == 0) { prgetstatus(pnp->pr_common->prc_proc, sp, VTOZONE(PTOV(pnp))); prunlock(pnp); error = pr_uioread(sp, sizeof (*sp), uiop); } kmem_free(sp, sizeof (*sp)); return (error); } static int pr_read_lstatus(prnode_t *pnp, uio_t *uiop, cred_t *cr) { proc_t *p; kthread_t *t; lwpdir_t *ldp; size_t size; prheader_t *php; lwpstatus_t *sp; int error; int nlwp; int i; ASSERT(pnp->pr_type == PR_LSTATUS); if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; nlwp = p->p_lwpcnt; size = sizeof (prheader_t) + nlwp * LSPAN(lwpstatus_t); /* drop p->p_lock to do kmem_alloc(KM_SLEEP) */ mutex_exit(&p->p_lock); php = kmem_zalloc(size, KM_SLEEP); mutex_enter(&p->p_lock); /* p->p_lwpcnt can't change while process is locked */ ASSERT(nlwp == p->p_lwpcnt); php->pr_nent = nlwp; php->pr_entsize = LSPAN(lwpstatus_t); sp = (lwpstatus_t *)(php + 1); for (ldp = p->p_lwpdir, i = 0; i < p->p_lwpdir_sz; i++, ldp++) { if (ldp->ld_entry == NULL || (t = ldp->ld_entry->le_thread) == NULL) continue; prgetlwpstatus(t, sp, VTOZONE(PTOV(pnp))); sp = (lwpstatus_t *)((caddr_t)sp + LSPAN(lwpstatus_t)); } prunlock(pnp); error = pr_uioread(php, size, uiop); kmem_free(php, size); return (error); } static int pr_read_psinfo(prnode_t *pnp, uio_t *uiop, cred_t *cr) { psinfo_t psinfo; proc_t *p; int error = 0; ASSERT(pnp->pr_type == PR_PSINFO); /* * We don't want the full treatment of prlock(pnp) here. * This file is world-readable and never goes invalid. * It doesn't matter if we are in the middle of an exec(). */ p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) error = ENOENT; else { ASSERT(p == pnp->pr_common->prc_proc); prgetpsinfo(p, &psinfo); prunlock(pnp); error = pr_uioread(&psinfo, sizeof (psinfo), uiop); } return (error); } static int pr_read_fdinfo(prnode_t *pnp, uio_t *uiop, cred_t *cr) { prfdinfo_t *fdinfo; list_t data; proc_t *p; vnode_t *vp; uint_t fd; file_t *fp; cred_t *file_cred; short ufp_flag; int error = 0; ASSERT(pnp->pr_type == PR_FDINFO); /* * This is a guess at the size of the structure that needs to * be returned. It's a balance between not allocating too much more * space than is required and not requiring too many subsequent * reallocations. Allocate it before acquiring the process lock. */ pr_iol_initlist(&data, sizeof (prfdinfo_t) + MAXPATHLEN + 2, 1); if ((error = prlock(pnp, ZNO)) != 0) { pr_iol_freelist(&data); return (error); } p = pnp->pr_common->prc_proc; if ((p->p_flag & SSYS) || p->p_as == &kas) { prunlock(pnp); pr_iol_freelist(&data); return (0); } fd = pnp->pr_index; /* Fetch and lock the file_t for this descriptor */ fp = pr_getf(p, fd, &ufp_flag); if (fp == NULL) { error = ENOENT; prunlock(pnp); goto out; } vp = fp->f_vnode; VN_HOLD(vp); /* * For fdinfo, we don't want to include the placeholder pr_misc at the * end of the struct. We'll terminate the data with an empty pr_misc * header before returning. */ fdinfo = pr_iol_newbuf(&data, offsetof(prfdinfo_t, pr_misc)); fdinfo->pr_fd = fd; fdinfo->pr_fdflags = ufp_flag; fdinfo->pr_fileflags = fp->f_flag2 << 16 | fp->f_flag; if ((fdinfo->pr_fileflags & (FSEARCH | FEXEC)) == 0) fdinfo->pr_fileflags += FOPEN; fdinfo->pr_offset = fp->f_offset; file_cred = fp->f_cred; crhold(file_cred); /* * Information from the vnode (rather than the file_t) is retrieved * later, in prgetfdinfo() - for example sock_getfasync() */ pr_releasef(p, fd); prunlock(pnp); error = prgetfdinfo(p, vp, fdinfo, cr, file_cred, &data); crfree(file_cred); VN_RELE(vp); out: if (error == 0) error = pr_iol_uiomove_and_free(&data, uiop, error); else pr_iol_freelist(&data); return (error); } static int pr_read_lpsinfo(prnode_t *pnp, uio_t *uiop, cred_t *cr) { proc_t *p; kthread_t *t; lwpdir_t *ldp; lwpent_t *lep; size_t size; prheader_t *php; lwpsinfo_t *sp; int error; int nlwp; int i; ASSERT(pnp->pr_type == PR_LPSINFO); /* * We don't want the full treatment of prlock(pnp) here. * This file is world-readable and never goes invalid. * It doesn't matter if we are in the middle of an exec(). */ p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) return (ENOENT); ASSERT(p == pnp->pr_common->prc_proc); if ((nlwp = p->p_lwpcnt + p->p_zombcnt) == 0) { prunlock(pnp); return (ENOENT); } size = sizeof (prheader_t) + nlwp * LSPAN(lwpsinfo_t); /* drop p->p_lock to do kmem_alloc(KM_SLEEP) */ mutex_exit(&p->p_lock); php = kmem_zalloc(size, KM_SLEEP); mutex_enter(&p->p_lock); /* p->p_lwpcnt can't change while process is locked */ ASSERT(nlwp == p->p_lwpcnt + p->p_zombcnt); php->pr_nent = nlwp; php->pr_entsize = LSPAN(lwpsinfo_t); sp = (lwpsinfo_t *)(php + 1); for (ldp = p->p_lwpdir, i = 0; i < p->p_lwpdir_sz; i++, ldp++) { if ((lep = ldp->ld_entry) == NULL) continue; if ((t = lep->le_thread) != NULL) prgetlwpsinfo(t, sp); else { bzero(sp, sizeof (*sp)); sp->pr_lwpid = lep->le_lwpid; sp->pr_state = SZOMB; sp->pr_sname = 'Z'; sp->pr_start.tv_sec = lep->le_start; sp->pr_bindpro = PBIND_NONE; sp->pr_bindpset = PS_NONE; } sp = (lwpsinfo_t *)((caddr_t)sp + LSPAN(lwpsinfo_t)); } prunlock(pnp); error = pr_uioread(php, size, uiop); kmem_free(php, size); return (error); } static int pr_read_map_common(prnode_t *pnp, uio_t *uiop, prnodetype_t type) { proc_t *p; struct as *as; list_t iolhead; int error; readmap_common: if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; as = p->p_as; if ((p->p_flag & SSYS) || as == &kas) { prunlock(pnp); return (0); } if (!AS_LOCK_TRYENTER(as, RW_WRITER)) { prunlock(pnp); delay(1); goto readmap_common; } mutex_exit(&p->p_lock); switch (type) { case PR_XMAP: error = prgetxmap(p, &iolhead); break; case PR_RMAP: error = prgetmap(p, 1, &iolhead); break; case PR_MAP: error = prgetmap(p, 0, &iolhead); break; } AS_LOCK_EXIT(as); mutex_enter(&p->p_lock); prunlock(pnp); error = pr_iol_uiomove_and_free(&iolhead, uiop, error); return (error); } static int pr_read_map(prnode_t *pnp, uio_t *uiop, cred_t *cr) { ASSERT(pnp->pr_type == PR_MAP); return (pr_read_map_common(pnp, uiop, pnp->pr_type)); } static int pr_read_rmap(prnode_t *pnp, uio_t *uiop, cred_t *cr) { ASSERT(pnp->pr_type == PR_RMAP); return (pr_read_map_common(pnp, uiop, pnp->pr_type)); } static int pr_read_xmap(prnode_t *pnp, uio_t *uiop, cred_t *cr) { ASSERT(pnp->pr_type == PR_XMAP); return (pr_read_map_common(pnp, uiop, pnp->pr_type)); } static int pr_read_cred(prnode_t *pnp, uio_t *uiop, cred_t *cr) { proc_t *p; prcred_t *pcrp; int error; size_t count; ASSERT(pnp->pr_type == PR_CRED); /* * We kmem_alloc() the prcred_t structure because * the number of supplementary groups is variable. */ pcrp = kmem_alloc(sizeof (prcred_t) + sizeof (gid_t) * (ngroups_max - 1), KM_SLEEP); if ((error = prlock(pnp, ZNO)) != 0) goto out; p = pnp->pr_common->prc_proc; ASSERT(p != NULL); prgetcred(p, pcrp); prunlock(pnp); count = sizeof (prcred_t); if (pcrp->pr_ngroups > 1) count += sizeof (gid_t) * (pcrp->pr_ngroups - 1); error = pr_uioread(pcrp, count, uiop); out: kmem_free(pcrp, sizeof (prcred_t) + sizeof (gid_t) * (ngroups_max - 1)); return (error); } static int pr_read_priv(prnode_t *pnp, uio_t *uiop, cred_t *cr) { proc_t *p; size_t psize = prgetprivsize(); prpriv_t *ppriv = kmem_alloc(psize, KM_SLEEP); int error; ASSERT(pnp->pr_type == PR_PRIV); if ((error = prlock(pnp, ZNO)) != 0) goto out; p = pnp->pr_common->prc_proc; ASSERT(p != NULL); prgetpriv(p, ppriv); prunlock(pnp); error = pr_uioread(ppriv, psize, uiop); out: kmem_free(ppriv, psize); return (error); } static int pr_read_sigact(prnode_t *pnp, uio_t *uiop, cred_t *cr) { int nsig = PROC_IS_BRANDED(curproc)? BROP(curproc)->b_nsig : NSIG; proc_t *p; struct sigaction *sap; int sig; int error; user_t *up; ASSERT(pnp->pr_type == PR_SIGACT); /* * We kmem_alloc() the sigaction array because * it is so big it might blow the kernel stack. */ sap = kmem_alloc((nsig-1) * sizeof (struct sigaction), KM_SLEEP); if ((error = prlock(pnp, ZNO)) != 0) goto out; p = pnp->pr_common->prc_proc; ASSERT(p != NULL); if (uiop->uio_offset >= (nsig-1)*sizeof (struct sigaction)) { prunlock(pnp); goto out; } up = PTOU(p); for (sig = 1; sig < nsig; sig++) prgetaction(p, up, sig, &sap[sig-1]); prunlock(pnp); error = pr_uioread(sap, (nsig - 1) * sizeof (struct sigaction), uiop); out: kmem_free(sap, (nsig-1) * sizeof (struct sigaction)); return (error); } static int pr_read_auxv(prnode_t *pnp, uio_t *uiop, cred_t *cr) { auxv_t auxv[__KERN_NAUXV_IMPL]; proc_t *p; user_t *up; int error; ASSERT(pnp->pr_type == PR_AUXV); if ((error = prlock(pnp, ZNO)) != 0) return (error); if (uiop->uio_offset >= sizeof (auxv)) { prunlock(pnp); return (0); } p = pnp->pr_common->prc_proc; up = PTOU(p); bcopy(up->u_auxv, auxv, sizeof (auxv)); prunlock(pnp); return (pr_uioread(auxv, sizeof (auxv), uiop)); } #if defined(__x86) /* * XX64 * This is almost certainly broken for the amd64 kernel, because * we have two kinds of LDT structures to export -- one for compatibility * mode, and one for long mode, sigh. * * For now let's just have a ldt of size 0 for 64-bit processes. */ static int pr_read_ldt(prnode_t *pnp, uio_t *uiop, cred_t *cr) { proc_t *p; struct ssd *ssd; size_t size; int error; ASSERT(pnp->pr_type == PR_LDT); if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; mutex_exit(&p->p_lock); mutex_enter(&p->p_ldtlock); size = prnldt(p) * sizeof (struct ssd); if (uiop->uio_offset >= size) { mutex_exit(&p->p_ldtlock); mutex_enter(&p->p_lock); prunlock(pnp); return (0); } ssd = kmem_alloc(size, KM_SLEEP); prgetldt(p, ssd); mutex_exit(&p->p_ldtlock); mutex_enter(&p->p_lock); prunlock(pnp); error = pr_uioread(ssd, size, uiop); kmem_free(ssd, size); return (error); } #endif /* __x86 */ static int pr_read_usage(prnode_t *pnp, uio_t *uiop, cred_t *cr) { prhusage_t *pup; prusage_t *upup; proc_t *p; kthread_t *t; int error; ASSERT(pnp->pr_type == PR_USAGE); /* allocate now, before locking the process */ pup = kmem_zalloc(sizeof (*pup), KM_SLEEP); upup = kmem_alloc(sizeof (*upup), KM_SLEEP); /* * We don't want the full treatment of prlock(pnp) here. * This file is world-readable and never goes invalid. * It doesn't matter if we are in the middle of an exec(). */ p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) { error = ENOENT; goto out; } ASSERT(p == pnp->pr_common->prc_proc); if (uiop->uio_offset >= sizeof (prusage_t)) { prunlock(pnp); error = 0; goto out; } pup->pr_tstamp = gethrtime(); pup->pr_count = p->p_defunct; pup->pr_create = p->p_mstart; pup->pr_term = p->p_mterm; pup->pr_rtime = p->p_mlreal; pup->pr_utime = p->p_acct[LMS_USER]; pup->pr_stime = p->p_acct[LMS_SYSTEM]; pup->pr_ttime = p->p_acct[LMS_TRAP]; pup->pr_tftime = p->p_acct[LMS_TFAULT]; pup->pr_dftime = p->p_acct[LMS_DFAULT]; pup->pr_kftime = p->p_acct[LMS_KFAULT]; pup->pr_ltime = p->p_acct[LMS_USER_LOCK]; pup->pr_slptime = p->p_acct[LMS_SLEEP]; pup->pr_wtime = p->p_acct[LMS_WAIT_CPU]; pup->pr_stoptime = p->p_acct[LMS_STOPPED]; pup->pr_minf = p->p_ru.minflt; pup->pr_majf = p->p_ru.majflt; pup->pr_nswap = p->p_ru.nswap; pup->pr_inblk = p->p_ru.inblock; pup->pr_oublk = p->p_ru.oublock; pup->pr_msnd = p->p_ru.msgsnd; pup->pr_mrcv = p->p_ru.msgrcv; pup->pr_sigs = p->p_ru.nsignals; pup->pr_vctx = p->p_ru.nvcsw; pup->pr_ictx = p->p_ru.nivcsw; pup->pr_sysc = p->p_ru.sysc; pup->pr_ioch = p->p_ru.ioch; /* * Add the usage information for each active lwp. */ if ((t = p->p_tlist) != NULL && !(pnp->pr_pcommon->prc_flags & PRC_DESTROY)) { do { if (t->t_proc_flag & TP_LWPEXIT) continue; pup->pr_count++; praddusage(t, pup); } while ((t = t->t_forw) != p->p_tlist); } prunlock(pnp); prcvtusage(pup, upup); error = pr_uioread(upup, sizeof (prusage_t), uiop); out: kmem_free(pup, sizeof (*pup)); kmem_free(upup, sizeof (*upup)); return (error); } static int pr_read_lusage(prnode_t *pnp, uio_t *uiop, cred_t *cr) { int nlwp; prhusage_t *pup; prheader_t *php; prusage_t *upup; size_t size; hrtime_t curtime; proc_t *p; kthread_t *t; lwpdir_t *ldp; int error; int i; ASSERT(pnp->pr_type == PR_LUSAGE); /* * We don't want the full treatment of prlock(pnp) here. * This file is world-readable and never goes invalid. * It doesn't matter if we are in the middle of an exec(). */ p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) return (ENOENT); ASSERT(p == pnp->pr_common->prc_proc); if ((nlwp = p->p_lwpcnt) == 0) { prunlock(pnp); return (ENOENT); } size = sizeof (prheader_t) + (nlwp + 1) * LSPAN(prusage_t); if (uiop->uio_offset >= size) { prunlock(pnp); return (0); } /* drop p->p_lock to do kmem_alloc(KM_SLEEP) */ mutex_exit(&p->p_lock); pup = kmem_zalloc(size + sizeof (prhusage_t), KM_SLEEP); mutex_enter(&p->p_lock); /* p->p_lwpcnt can't change while process is locked */ ASSERT(nlwp == p->p_lwpcnt); php = (prheader_t *)(pup + 1); upup = (prusage_t *)(php + 1); php->pr_nent = nlwp + 1; php->pr_entsize = LSPAN(prusage_t); curtime = gethrtime(); /* * First the summation over defunct lwps. */ pup->pr_count = p->p_defunct; pup->pr_tstamp = curtime; pup->pr_create = p->p_mstart; pup->pr_term = p->p_mterm; pup->pr_rtime = p->p_mlreal; pup->pr_utime = p->p_acct[LMS_USER]; pup->pr_stime = p->p_acct[LMS_SYSTEM]; pup->pr_ttime = p->p_acct[LMS_TRAP]; pup->pr_tftime = p->p_acct[LMS_TFAULT]; pup->pr_dftime = p->p_acct[LMS_DFAULT]; pup->pr_kftime = p->p_acct[LMS_KFAULT]; pup->pr_ltime = p->p_acct[LMS_USER_LOCK]; pup->pr_slptime = p->p_acct[LMS_SLEEP]; pup->pr_wtime = p->p_acct[LMS_WAIT_CPU]; pup->pr_stoptime = p->p_acct[LMS_STOPPED]; pup->pr_minf = p->p_ru.minflt; pup->pr_majf = p->p_ru.majflt; pup->pr_nswap = p->p_ru.nswap; pup->pr_inblk = p->p_ru.inblock; pup->pr_oublk = p->p_ru.oublock; pup->pr_msnd = p->p_ru.msgsnd; pup->pr_mrcv = p->p_ru.msgrcv; pup->pr_sigs = p->p_ru.nsignals; pup->pr_vctx = p->p_ru.nvcsw; pup->pr_ictx = p->p_ru.nivcsw; pup->pr_sysc = p->p_ru.sysc; pup->pr_ioch = p->p_ru.ioch; prcvtusage(pup, upup); /* * Fill one prusage struct for each active lwp. */ for (ldp = p->p_lwpdir, i = 0; i < p->p_lwpdir_sz; i++, ldp++) { if (ldp->ld_entry == NULL || (t = ldp->ld_entry->le_thread) == NULL) continue; ASSERT(!(t->t_proc_flag & TP_LWPEXIT)); ASSERT(nlwp > 0); --nlwp; upup = (prusage_t *)((caddr_t)upup + LSPAN(prusage_t)); prgetusage(t, pup); prcvtusage(pup, upup); } ASSERT(nlwp == 0); prunlock(pnp); error = pr_uioread(php, size, uiop); kmem_free(pup, size + sizeof (prhusage_t)); return (error); } static int pr_read_pagedata(prnode_t *pnp, uio_t *uiop, cred_t *cr) { proc_t *p; int error; ASSERT(pnp->pr_type == PR_PAGEDATA); if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; if ((p->p_flag & SSYS) || p->p_as == &kas) { prunlock(pnp); return (0); } mutex_exit(&p->p_lock); error = prpdread(p, pnp->pr_hatid, uiop); mutex_enter(&p->p_lock); prunlock(pnp); return (error); } static int pr_read_opagedata(prnode_t *pnp, uio_t *uiop, cred_t *cr) { proc_t *p; struct as *as; int error; ASSERT(pnp->pr_type == PR_OPAGEDATA); if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; as = p->p_as; if ((p->p_flag & SSYS) || as == &kas) { prunlock(pnp); return (0); } mutex_exit(&p->p_lock); error = oprpdread(as, pnp->pr_hatid, uiop); mutex_enter(&p->p_lock); prunlock(pnp); return (error); } static int pr_read_watch(prnode_t *pnp, uio_t *uiop, cred_t *cr) { proc_t *p; int error; prwatch_t *Bpwp; size_t size; prwatch_t *pwp; int nwarea; struct watched_area *pwarea; ASSERT(pnp->pr_type == PR_WATCH); if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; nwarea = avl_numnodes(&p->p_warea); size = nwarea * sizeof (prwatch_t); if (uiop->uio_offset >= size) { prunlock(pnp); return (0); } /* drop p->p_lock to do kmem_alloc(KM_SLEEP) */ mutex_exit(&p->p_lock); Bpwp = pwp = kmem_zalloc(size, KM_SLEEP); mutex_enter(&p->p_lock); /* p->p_nwarea can't change while process is locked */ ASSERT(nwarea == avl_numnodes(&p->p_warea)); /* gather the watched areas */ for (pwarea = avl_first(&p->p_warea); pwarea != NULL; pwarea = AVL_NEXT(&p->p_warea, pwarea), pwp++) { pwp->pr_vaddr = (uintptr_t)pwarea->wa_vaddr; pwp->pr_size = pwarea->wa_eaddr - pwarea->wa_vaddr; pwp->pr_wflags = (int)pwarea->wa_flags; } prunlock(pnp); error = pr_uioread(Bpwp, size, uiop); kmem_free(Bpwp, size); return (error); } static int pr_read_lwpstatus(prnode_t *pnp, uio_t *uiop, cred_t *cr) { lwpstatus_t *sp; int error; ASSERT(pnp->pr_type == PR_LWPSTATUS); /* * We kmem_alloc() the lwpstatus structure because * it is so big it might blow the kernel stack. */ sp = kmem_alloc(sizeof (*sp), KM_SLEEP); if ((error = prlock(pnp, ZNO)) != 0) goto out; if (uiop->uio_offset >= sizeof (*sp)) { prunlock(pnp); goto out; } prgetlwpstatus(pnp->pr_common->prc_thread, sp, VTOZONE(PTOV(pnp))); prunlock(pnp); error = pr_uioread(sp, sizeof (*sp), uiop); out: kmem_free(sp, sizeof (*sp)); return (error); } static int pr_read_lwpsinfo(prnode_t *pnp, uio_t *uiop, cred_t *cr) { lwpsinfo_t lwpsinfo; proc_t *p; kthread_t *t; lwpent_t *lep; ASSERT(pnp->pr_type == PR_LWPSINFO); /* * We don't want the full treatment of prlock(pnp) here. * This file is world-readable and never goes invalid. * It doesn't matter if we are in the middle of an exec(). */ p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) return (ENOENT); ASSERT(p == pnp->pr_common->prc_proc); if (pnp->pr_common->prc_tslot == -1) { prunlock(pnp); return (ENOENT); } if (uiop->uio_offset >= sizeof (lwpsinfo)) { prunlock(pnp); return (0); } if ((t = pnp->pr_common->prc_thread) != NULL) prgetlwpsinfo(t, &lwpsinfo); else { lep = p->p_lwpdir[pnp->pr_common->prc_tslot].ld_entry; bzero(&lwpsinfo, sizeof (lwpsinfo)); lwpsinfo.pr_lwpid = lep->le_lwpid; lwpsinfo.pr_state = SZOMB; lwpsinfo.pr_sname = 'Z'; lwpsinfo.pr_start.tv_sec = lep->le_start; lwpsinfo.pr_bindpro = PBIND_NONE; lwpsinfo.pr_bindpset = PS_NONE; } prunlock(pnp); return (pr_uioread(&lwpsinfo, sizeof (lwpsinfo), uiop)); } static int pr_read_lwpusage(prnode_t *pnp, uio_t *uiop, cred_t *cr) { prhusage_t *pup; prusage_t *upup; proc_t *p; int error; ASSERT(pnp->pr_type == PR_LWPUSAGE); /* allocate now, before locking the process */ pup = kmem_zalloc(sizeof (*pup), KM_SLEEP); upup = kmem_alloc(sizeof (*upup), KM_SLEEP); /* * We don't want the full treatment of prlock(pnp) here. * This file is world-readable and never goes invalid. * It doesn't matter if we are in the middle of an exec(). */ p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) { error = ENOENT; goto out; } ASSERT(p == pnp->pr_common->prc_proc); if (pnp->pr_common->prc_thread == NULL) { prunlock(pnp); error = ENOENT; goto out; } if (uiop->uio_offset >= sizeof (prusage_t)) { prunlock(pnp); error = 0; goto out; } pup->pr_tstamp = gethrtime(); prgetusage(pnp->pr_common->prc_thread, pup); prunlock(pnp); prcvtusage(pup, upup); error = pr_uioread(upup, sizeof (prusage_t), uiop); out: kmem_free(pup, sizeof (*pup)); kmem_free(upup, sizeof (*upup)); return (error); } static int pr_read_lwpname(prnode_t *pnp, uio_t *uiop, cred_t *cr) { char lwpname[THREAD_NAME_MAX]; kthread_t *t; int error; ASSERT(pnp->pr_type == PR_LWPNAME); if (uiop->uio_offset >= THREAD_NAME_MAX) return (0); if ((error = prlock(pnp, ZNO)) != 0) return (error); bzero(lwpname, sizeof (lwpname)); t = pnp->pr_common->prc_thread; if (t->t_name != NULL) (void) strlcpy(lwpname, t->t_name, sizeof (lwpname)); prunlock(pnp); return (pr_uioread(lwpname, sizeof (lwpname), uiop)); } /* ARGSUSED */ static int pr_read_xregs(prnode_t *pnp, uio_t *uiop, cred_t *cr) { #if defined(__sparc) proc_t *p; kthread_t *t; int error; char *xreg; size_t size; ASSERT(pnp->pr_type == PR_XREGS); xreg = kmem_zalloc(sizeof (prxregset_t), KM_SLEEP); if ((error = prlock(pnp, ZNO)) != 0) goto out; p = pnp->pr_common->prc_proc; t = pnp->pr_common->prc_thread; size = prhasx(p)? prgetprxregsize(p) : 0; if (uiop->uio_offset >= size) { prunlock(pnp); goto out; } /* drop p->p_lock while (possibly) touching the stack */ mutex_exit(&p->p_lock); prgetprxregs(ttolwp(t), xreg); mutex_enter(&p->p_lock); prunlock(pnp); error = pr_uioread(xreg, size, uiop); out: kmem_free(xreg, sizeof (prxregset_t)); return (error); #else return (0); #endif } static int pr_read_spymaster(prnode_t *pnp, uio_t *uiop, cred_t *cr) { psinfo_t psinfo; int error; klwp_t *lwp; ASSERT(pnp->pr_type == PR_SPYMASTER); if ((error = prlock(pnp, ZNO)) != 0) return (error); if (pnp->pr_common->prc_thread == NULL) { prunlock(pnp); return (0); } lwp = pnp->pr_common->prc_thread->t_lwp; if (lwp->lwp_spymaster == NULL) { prunlock(pnp); return (0); } bcopy(lwp->lwp_spymaster, &psinfo, sizeof (psinfo_t)); prunlock(pnp); return (pr_uioread(&psinfo, sizeof (psinfo), uiop)); } static int pr_read_secflags(prnode_t *pnp, uio_t *uiop, cred_t *cr) { prsecflags_t ret; int error; proc_t *p; ASSERT(pnp->pr_type == PR_SECFLAGS); if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; prgetsecflags(p, &ret); prunlock(pnp); return (pr_uioread(&ret, sizeof (ret), uiop)); } #if defined(__sparc) static int pr_read_gwindows(prnode_t *pnp, uio_t *uiop, cred_t *cr) { proc_t *p; kthread_t *t; gwindows_t *gwp; int error; size_t size; ASSERT(pnp->pr_type == PR_GWINDOWS); gwp = kmem_zalloc(sizeof (gwindows_t), KM_SLEEP); if ((error = prlock(pnp, ZNO)) != 0) goto out; p = pnp->pr_common->prc_proc; t = pnp->pr_common->prc_thread; /* * Drop p->p_lock while touching the stack. * The P_PR_LOCK flag prevents the lwp from * disappearing while we do this. */ mutex_exit(&p->p_lock); if ((size = prnwindows(ttolwp(t))) != 0) size = sizeof (gwindows_t) - (SPARC_MAXREGWINDOW - size) * sizeof (struct rwindow); if (uiop->uio_offset >= size) { mutex_enter(&p->p_lock); prunlock(pnp); goto out; } prgetwindows(ttolwp(t), gwp); mutex_enter(&p->p_lock); prunlock(pnp); error = pr_uioread(gwp, size, uiop); out: kmem_free(gwp, sizeof (gwindows_t)); return (error); } /* ARGSUSED */ static int pr_read_asrs(prnode_t *pnp, uio_t *uiop, cred_t *cr) { int error; ASSERT(pnp->pr_type == PR_ASRS); /* the asrs file exists only for sparc v9 _LP64 processes */ if ((error = prlock(pnp, ZNO)) == 0) { proc_t *p = pnp->pr_common->prc_proc; kthread_t *t = pnp->pr_common->prc_thread; asrset_t asrset; if (p->p_model != DATAMODEL_LP64 || uiop->uio_offset >= sizeof (asrset_t)) { prunlock(pnp); return (0); } /* * Drop p->p_lock while touching the stack. * The P_PR_LOCK flag prevents the lwp from * disappearing while we do this. */ mutex_exit(&p->p_lock); prgetasregs(ttolwp(t), asrset); mutex_enter(&p->p_lock); prunlock(pnp); error = pr_uioread(&asrset[0], sizeof (asrset_t), uiop); } return (error); } #endif /* __sparc */ static int pr_read_piddir(prnode_t *pnp, uio_t *uiop, cred_t *cr) { ASSERT(pnp->pr_type == PR_PIDDIR); ASSERT(pnp->pr_pidfile != NULL); /* use the underlying PR_PIDFILE to read the process */ pnp = VTOP(pnp->pr_pidfile); ASSERT(pnp->pr_type == PR_PIDFILE); return (pr_read_pidfile(pnp, uiop)); } static int pr_read_pidfile(prnode_t *pnp, uio_t *uiop, cred_t *cr) { int error; ASSERT(pnp->pr_type == PR_PIDFILE || pnp->pr_type == PR_LWPIDFILE); if ((error = prlock(pnp, ZNO)) == 0) { proc_t *p = pnp->pr_common->prc_proc; struct as *as = p->p_as; if ((p->p_flag & SSYS) || as == &kas) { /* * /proc I/O cannot be done to a system process. */ error = EIO; /* old /proc semantics */ } else { /* * We drop p_lock because we don't want to hold * it over an I/O operation because that could * lead to deadlock with the clock thread. * The process will not disappear and its address * space will not change because it is marked P_PR_LOCK. */ mutex_exit(&p->p_lock); error = prusrio(p, UIO_READ, uiop, 1); mutex_enter(&p->p_lock); } prunlock(pnp); } return (error); } #ifdef _SYSCALL32_IMPL /* * Array of ILP32 read functions, indexed by /proc file type. */ static int pr_read_status_32(), pr_read_lstatus_32(), pr_read_psinfo_32(), pr_read_lpsinfo_32(), pr_read_map_32(), pr_read_rmap_32(), pr_read_xmap_32(), pr_read_sigact_32(), pr_read_auxv_32(), pr_read_usage_32(), pr_read_lusage_32(), pr_read_pagedata_32(), pr_read_watch_32(), pr_read_lwpstatus_32(), pr_read_lwpsinfo_32(), pr_read_lwpusage_32(), pr_read_spymaster_32(), #if defined(__sparc) pr_read_gwindows_32(), #endif pr_read_opagedata_32(); static int (*pr_read_function_32[PR_NFILES])() = { pr_read_inval, /* /proc */ pr_read_inval, /* /proc/self */ pr_read_piddir, /* /proc/ (old /proc read()) */ pr_read_as, /* /proc//as */ pr_read_inval, /* /proc//ctl */ pr_read_status_32, /* /proc//status */ pr_read_lstatus_32, /* /proc//lstatus */ pr_read_psinfo_32, /* /proc//psinfo */ pr_read_lpsinfo_32, /* /proc//lpsinfo */ pr_read_map_32, /* /proc//map */ pr_read_rmap_32, /* /proc//rmap */ pr_read_xmap_32, /* /proc//xmap */ pr_read_cred, /* /proc//cred */ pr_read_sigact_32, /* /proc//sigact */ pr_read_auxv_32, /* /proc//auxv */ #if defined(__x86) pr_read_ldt, /* /proc//ldt */ #endif pr_read_usage_32, /* /proc//usage */ pr_read_lusage_32, /* /proc//lusage */ pr_read_pagedata_32, /* /proc//pagedata */ pr_read_watch_32, /* /proc//watch */ pr_read_inval, /* /proc//cwd */ pr_read_inval, /* /proc//root */ pr_read_inval, /* /proc//fd */ pr_read_inval, /* /proc//fd/nn */ pr_read_inval, /* /proc//fdinfo */ pr_read_fdinfo, /* /proc//fdinfo/nn */ pr_read_inval, /* /proc//object */ pr_read_inval, /* /proc//object/xxx */ pr_read_inval, /* /proc//lwp */ pr_read_inval, /* /proc//lwp/ */ pr_read_inval, /* /proc//lwp//lwpctl */ pr_read_lwpname, /* /proc//lwp//lwpname */ pr_read_lwpstatus_32, /* /proc//lwp//lwpstatus */ pr_read_lwpsinfo_32, /* /proc//lwp//lwpsinfo */ pr_read_lwpusage_32, /* /proc//lwp//lwpusage */ pr_read_xregs, /* /proc//lwp//xregs */ pr_read_inval, /* /proc//lwp//templates */ pr_read_inval, /* /proc//lwp//templates/ */ pr_read_spymaster_32, /* /proc//lwp//spymaster */ #if defined(__sparc) pr_read_gwindows_32, /* /proc//lwp//gwindows */ pr_read_asrs, /* /proc//lwp//asrs */ #endif pr_read_priv, /* /proc//priv */ pr_read_inval, /* /proc//path */ pr_read_inval, /* /proc//path/xxx */ pr_read_inval, /* /proc//contracts */ pr_read_inval, /* /proc//contracts/ */ pr_read_secflags, /* /proc//secflags */ pr_read_pidfile, /* old process file */ pr_read_pidfile, /* old lwp file */ pr_read_opagedata_32, /* old pagedata file */ }; static int pr_read_status_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { pstatus32_t *sp; proc_t *p; int error; ASSERT(pnp->pr_type == PR_STATUS); /* * We kmem_alloc() the pstatus structure because * it is so big it might blow the kernel stack. */ sp = kmem_alloc(sizeof (*sp), KM_SLEEP); if ((error = prlock(pnp, ZNO)) == 0) { /* * A 32-bit process cannot get the status of a 64-bit process. * The fields for the 64-bit quantities are not large enough. */ p = pnp->pr_common->prc_proc; if (PROCESS_NOT_32BIT(p)) { prunlock(pnp); error = EOVERFLOW; } else { prgetstatus32(pnp->pr_common->prc_proc, sp, VTOZONE(PTOV(pnp))); prunlock(pnp); error = pr_uioread(sp, sizeof (*sp), uiop); } } kmem_free((caddr_t)sp, sizeof (*sp)); return (error); } static int pr_read_lstatus_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { proc_t *p; kthread_t *t; lwpdir_t *ldp; size_t size; prheader32_t *php; lwpstatus32_t *sp; int error; int nlwp; int i; ASSERT(pnp->pr_type == PR_LSTATUS); if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; /* * A 32-bit process cannot get the status of a 64-bit process. * The fields for the 64-bit quantities are not large enough. */ if (PROCESS_NOT_32BIT(p)) { prunlock(pnp); return (EOVERFLOW); } nlwp = p->p_lwpcnt; size = sizeof (prheader32_t) + nlwp * LSPAN32(lwpstatus32_t); /* drop p->p_lock to do kmem_alloc(KM_SLEEP) */ mutex_exit(&p->p_lock); php = kmem_zalloc(size, KM_SLEEP); mutex_enter(&p->p_lock); /* p->p_lwpcnt can't change while process is locked */ ASSERT(nlwp == p->p_lwpcnt); php->pr_nent = nlwp; php->pr_entsize = LSPAN32(lwpstatus32_t); sp = (lwpstatus32_t *)(php + 1); for (ldp = p->p_lwpdir, i = 0; i < p->p_lwpdir_sz; i++, ldp++) { if (ldp->ld_entry == NULL || (t = ldp->ld_entry->le_thread) == NULL) continue; prgetlwpstatus32(t, sp, VTOZONE(PTOV(pnp))); sp = (lwpstatus32_t *)((caddr_t)sp + LSPAN32(lwpstatus32_t)); } prunlock(pnp); error = pr_uioread(php, size, uiop); kmem_free(php, size); return (error); } static int pr_read_psinfo_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { psinfo32_t psinfo; proc_t *p; int error = 0; ASSERT(pnp->pr_type == PR_PSINFO); /* * We don't want the full treatment of prlock(pnp) here. * This file is world-readable and never goes invalid. * It doesn't matter if we are in the middle of an exec(). */ p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) error = ENOENT; else { ASSERT(p == pnp->pr_common->prc_proc); prgetpsinfo32(p, &psinfo); prunlock(pnp); error = pr_uioread(&psinfo, sizeof (psinfo), uiop); } return (error); } static int pr_read_lpsinfo_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { proc_t *p; kthread_t *t; lwpdir_t *ldp; lwpent_t *lep; size_t size; prheader32_t *php; lwpsinfo32_t *sp; int error; int nlwp; int i; ASSERT(pnp->pr_type == PR_LPSINFO); /* * We don't want the full treatment of prlock(pnp) here. * This file is world-readable and never goes invalid. * It doesn't matter if we are in the middle of an exec(). */ p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) return (ENOENT); ASSERT(p == pnp->pr_common->prc_proc); if ((nlwp = p->p_lwpcnt + p->p_zombcnt) == 0) { prunlock(pnp); return (ENOENT); } size = sizeof (prheader32_t) + nlwp * LSPAN32(lwpsinfo32_t); /* drop p->p_lock to do kmem_alloc(KM_SLEEP) */ mutex_exit(&p->p_lock); php = kmem_zalloc(size, KM_SLEEP); mutex_enter(&p->p_lock); /* p->p_lwpcnt can't change while process is locked */ ASSERT(nlwp == p->p_lwpcnt + p->p_zombcnt); php->pr_nent = nlwp; php->pr_entsize = LSPAN32(lwpsinfo32_t); sp = (lwpsinfo32_t *)(php + 1); for (ldp = p->p_lwpdir, i = 0; i < p->p_lwpdir_sz; i++, ldp++) { if ((lep = ldp->ld_entry) == NULL) continue; if ((t = lep->le_thread) != NULL) prgetlwpsinfo32(t, sp); else { bzero(sp, sizeof (*sp)); sp->pr_lwpid = lep->le_lwpid; sp->pr_state = SZOMB; sp->pr_sname = 'Z'; sp->pr_start.tv_sec = (time32_t)lep->le_start; } sp = (lwpsinfo32_t *)((caddr_t)sp + LSPAN32(lwpsinfo32_t)); } prunlock(pnp); error = pr_uioread(php, size, uiop); kmem_free(php, size); return (error); } static int pr_read_map_common_32(prnode_t *pnp, uio_t *uiop, prnodetype_t type) { proc_t *p; struct as *as; list_t iolhead; int error; readmap32_common: if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; as = p->p_as; if ((p->p_flag & SSYS) || as == &kas) { prunlock(pnp); return (0); } if (PROCESS_NOT_32BIT(p)) { prunlock(pnp); return (EOVERFLOW); } if (!AS_LOCK_TRYENTER(as, RW_WRITER)) { prunlock(pnp); delay(1); goto readmap32_common; } mutex_exit(&p->p_lock); switch (type) { case PR_XMAP: error = prgetxmap32(p, &iolhead); break; case PR_RMAP: error = prgetmap32(p, 1, &iolhead); break; case PR_MAP: error = prgetmap32(p, 0, &iolhead); break; } AS_LOCK_EXIT(as); mutex_enter(&p->p_lock); prunlock(pnp); error = pr_iol_uiomove_and_free(&iolhead, uiop, error); return (error); } static int pr_read_map_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { ASSERT(pnp->pr_type == PR_MAP); return (pr_read_map_common_32(pnp, uiop, pnp->pr_type)); } static int pr_read_rmap_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { ASSERT(pnp->pr_type == PR_RMAP); return (pr_read_map_common_32(pnp, uiop, pnp->pr_type)); } static int pr_read_xmap_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { ASSERT(pnp->pr_type == PR_XMAP); return (pr_read_map_common_32(pnp, uiop, pnp->pr_type)); } static int pr_read_sigact_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { int nsig = PROC_IS_BRANDED(curproc)? BROP(curproc)->b_nsig : NSIG; proc_t *p; struct sigaction32 *sap; int sig; int error; user_t *up; ASSERT(pnp->pr_type == PR_SIGACT); /* * We kmem_alloc() the sigaction32 array because * it is so big it might blow the kernel stack. */ sap = kmem_alloc((nsig-1) * sizeof (struct sigaction32), KM_SLEEP); if ((error = prlock(pnp, ZNO)) != 0) goto out; p = pnp->pr_common->prc_proc; if (PROCESS_NOT_32BIT(p)) { prunlock(pnp); error = EOVERFLOW; goto out; } if (uiop->uio_offset >= (nsig-1) * sizeof (struct sigaction32)) { prunlock(pnp); goto out; } up = PTOU(p); for (sig = 1; sig < nsig; sig++) prgetaction32(p, up, sig, &sap[sig-1]); prunlock(pnp); error = pr_uioread(sap, (nsig - 1) * sizeof (struct sigaction32), uiop); out: kmem_free(sap, (nsig-1) * sizeof (struct sigaction32)); return (error); } static int pr_read_auxv_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { auxv32_t auxv[__KERN_NAUXV_IMPL]; proc_t *p; user_t *up; int error; int i; ASSERT(pnp->pr_type == PR_AUXV); if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; if (PROCESS_NOT_32BIT(p)) { prunlock(pnp); return (EOVERFLOW); } if (uiop->uio_offset >= sizeof (auxv)) { prunlock(pnp); return (0); } up = PTOU(p); for (i = 0; i < __KERN_NAUXV_IMPL; i++) { auxv[i].a_type = (int32_t)up->u_auxv[i].a_type; auxv[i].a_un.a_val = (int32_t)up->u_auxv[i].a_un.a_val; } prunlock(pnp); return (pr_uioread(auxv, sizeof (auxv), uiop)); } static int pr_read_usage_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { prhusage_t *pup; prusage32_t *upup; proc_t *p; kthread_t *t; int error; ASSERT(pnp->pr_type == PR_USAGE); /* allocate now, before locking the process */ pup = kmem_zalloc(sizeof (*pup), KM_SLEEP); upup = kmem_alloc(sizeof (*upup), KM_SLEEP); /* * We don't want the full treatment of prlock(pnp) here. * This file is world-readable and never goes invalid. * It doesn't matter if we are in the middle of an exec(). */ p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) { error = ENOENT; goto out; } ASSERT(p == pnp->pr_common->prc_proc); if (uiop->uio_offset >= sizeof (prusage32_t)) { prunlock(pnp); error = 0; goto out; } pup->pr_tstamp = gethrtime(); pup->pr_count = p->p_defunct; pup->pr_create = p->p_mstart; pup->pr_term = p->p_mterm; pup->pr_rtime = p->p_mlreal; pup->pr_utime = p->p_acct[LMS_USER]; pup->pr_stime = p->p_acct[LMS_SYSTEM]; pup->pr_ttime = p->p_acct[LMS_TRAP]; pup->pr_tftime = p->p_acct[LMS_TFAULT]; pup->pr_dftime = p->p_acct[LMS_DFAULT]; pup->pr_kftime = p->p_acct[LMS_KFAULT]; pup->pr_ltime = p->p_acct[LMS_USER_LOCK]; pup->pr_slptime = p->p_acct[LMS_SLEEP]; pup->pr_wtime = p->p_acct[LMS_WAIT_CPU]; pup->pr_stoptime = p->p_acct[LMS_STOPPED]; pup->pr_minf = p->p_ru.minflt; pup->pr_majf = p->p_ru.majflt; pup->pr_nswap = p->p_ru.nswap; pup->pr_inblk = p->p_ru.inblock; pup->pr_oublk = p->p_ru.oublock; pup->pr_msnd = p->p_ru.msgsnd; pup->pr_mrcv = p->p_ru.msgrcv; pup->pr_sigs = p->p_ru.nsignals; pup->pr_vctx = p->p_ru.nvcsw; pup->pr_ictx = p->p_ru.nivcsw; pup->pr_sysc = p->p_ru.sysc; pup->pr_ioch = p->p_ru.ioch; /* * Add the usage information for each active lwp. */ if ((t = p->p_tlist) != NULL && !(pnp->pr_pcommon->prc_flags & PRC_DESTROY)) { do { if (t->t_proc_flag & TP_LWPEXIT) continue; pup->pr_count++; praddusage(t, pup); } while ((t = t->t_forw) != p->p_tlist); } prunlock(pnp); prcvtusage32(pup, upup); error = pr_uioread(upup, sizeof (prusage32_t), uiop); out: kmem_free(pup, sizeof (*pup)); kmem_free(upup, sizeof (*upup)); return (error); } static int pr_read_lusage_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { int nlwp; prhusage_t *pup; prheader32_t *php; prusage32_t *upup; size_t size; hrtime_t curtime; proc_t *p; kthread_t *t; lwpdir_t *ldp; int error; int i; ASSERT(pnp->pr_type == PR_LUSAGE); /* * We don't want the full treatment of prlock(pnp) here. * This file is world-readable and never goes invalid. * It doesn't matter if we are in the middle of an exec(). */ p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) return (ENOENT); ASSERT(p == pnp->pr_common->prc_proc); if ((nlwp = p->p_lwpcnt) == 0) { prunlock(pnp); return (ENOENT); } size = sizeof (prheader32_t) + (nlwp + 1) * LSPAN32(prusage32_t); if (uiop->uio_offset >= size) { prunlock(pnp); return (0); } /* drop p->p_lock to do kmem_alloc(KM_SLEEP) */ mutex_exit(&p->p_lock); pup = kmem_zalloc(size + sizeof (prhusage_t), KM_SLEEP); mutex_enter(&p->p_lock); /* p->p_lwpcnt can't change while process is locked */ ASSERT(nlwp == p->p_lwpcnt); php = (prheader32_t *)(pup + 1); upup = (prusage32_t *)(php + 1); php->pr_nent = nlwp + 1; php->pr_entsize = LSPAN32(prusage32_t); curtime = gethrtime(); /* * First the summation over defunct lwps. */ pup->pr_count = p->p_defunct; pup->pr_tstamp = curtime; pup->pr_create = p->p_mstart; pup->pr_term = p->p_mterm; pup->pr_rtime = p->p_mlreal; pup->pr_utime = p->p_acct[LMS_USER]; pup->pr_stime = p->p_acct[LMS_SYSTEM]; pup->pr_ttime = p->p_acct[LMS_TRAP]; pup->pr_tftime = p->p_acct[LMS_TFAULT]; pup->pr_dftime = p->p_acct[LMS_DFAULT]; pup->pr_kftime = p->p_acct[LMS_KFAULT]; pup->pr_ltime = p->p_acct[LMS_USER_LOCK]; pup->pr_slptime = p->p_acct[LMS_SLEEP]; pup->pr_wtime = p->p_acct[LMS_WAIT_CPU]; pup->pr_stoptime = p->p_acct[LMS_STOPPED]; pup->pr_minf = p->p_ru.minflt; pup->pr_majf = p->p_ru.majflt; pup->pr_nswap = p->p_ru.nswap; pup->pr_inblk = p->p_ru.inblock; pup->pr_oublk = p->p_ru.oublock; pup->pr_msnd = p->p_ru.msgsnd; pup->pr_mrcv = p->p_ru.msgrcv; pup->pr_sigs = p->p_ru.nsignals; pup->pr_vctx = p->p_ru.nvcsw; pup->pr_ictx = p->p_ru.nivcsw; pup->pr_sysc = p->p_ru.sysc; pup->pr_ioch = p->p_ru.ioch; prcvtusage32(pup, upup); /* * Fill one prusage struct for each active lwp. */ for (ldp = p->p_lwpdir, i = 0; i < p->p_lwpdir_sz; i++, ldp++) { if (ldp->ld_entry == NULL || (t = ldp->ld_entry->le_thread) == NULL) continue; ASSERT(!(t->t_proc_flag & TP_LWPEXIT)); ASSERT(nlwp > 0); --nlwp; upup = (prusage32_t *) ((caddr_t)upup + LSPAN32(prusage32_t)); prgetusage(t, pup); prcvtusage32(pup, upup); } ASSERT(nlwp == 0); prunlock(pnp); error = pr_uioread(php, size, uiop); kmem_free(pup, size + sizeof (prhusage_t)); return (error); } static int pr_read_pagedata_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { proc_t *p; int error; ASSERT(pnp->pr_type == PR_PAGEDATA); if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; if ((p->p_flag & SSYS) || p->p_as == &kas) { prunlock(pnp); return (0); } if (PROCESS_NOT_32BIT(p)) { prunlock(pnp); return (EOVERFLOW); } mutex_exit(&p->p_lock); error = prpdread32(p, pnp->pr_hatid, uiop); mutex_enter(&p->p_lock); prunlock(pnp); return (error); } static int pr_read_opagedata_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { proc_t *p; struct as *as; int error; ASSERT(pnp->pr_type == PR_OPAGEDATA); if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; as = p->p_as; if ((p->p_flag & SSYS) || as == &kas) { prunlock(pnp); return (0); } if (PROCESS_NOT_32BIT(p)) { prunlock(pnp); return (EOVERFLOW); } mutex_exit(&p->p_lock); error = oprpdread32(as, pnp->pr_hatid, uiop); mutex_enter(&p->p_lock); prunlock(pnp); return (error); } static int pr_read_watch_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { proc_t *p; int error; prwatch32_t *Bpwp; size_t size; prwatch32_t *pwp; int nwarea; struct watched_area *pwarea; ASSERT(pnp->pr_type == PR_WATCH); if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; if (PROCESS_NOT_32BIT(p)) { prunlock(pnp); return (EOVERFLOW); } nwarea = avl_numnodes(&p->p_warea); size = nwarea * sizeof (prwatch32_t); if (uiop->uio_offset >= size) { prunlock(pnp); return (0); } /* drop p->p_lock to do kmem_alloc(KM_SLEEP) */ mutex_exit(&p->p_lock); Bpwp = pwp = kmem_zalloc(size, KM_SLEEP); mutex_enter(&p->p_lock); /* p->p_nwarea can't change while process is locked */ ASSERT(nwarea == avl_numnodes(&p->p_warea)); /* gather the watched areas */ for (pwarea = avl_first(&p->p_warea); pwarea != NULL; pwarea = AVL_NEXT(&p->p_warea, pwarea), pwp++) { pwp->pr_vaddr = (caddr32_t)(uintptr_t)pwarea->wa_vaddr; pwp->pr_size = (size32_t)(pwarea->wa_eaddr - pwarea->wa_vaddr); pwp->pr_wflags = (int)pwarea->wa_flags; } prunlock(pnp); error = pr_uioread(Bpwp, size, uiop); kmem_free(Bpwp, size); return (error); } static int pr_read_lwpstatus_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { lwpstatus32_t *sp; proc_t *p; int error; ASSERT(pnp->pr_type == PR_LWPSTATUS); /* * We kmem_alloc() the lwpstatus structure because * it is so big it might blow the kernel stack. */ sp = kmem_alloc(sizeof (*sp), KM_SLEEP); if ((error = prlock(pnp, ZNO)) != 0) goto out; /* * A 32-bit process cannot get the status of a 64-bit process. * The fields for the 64-bit quantities are not large enough. */ p = pnp->pr_common->prc_proc; if (PROCESS_NOT_32BIT(p)) { prunlock(pnp); error = EOVERFLOW; goto out; } if (uiop->uio_offset >= sizeof (*sp)) { prunlock(pnp); goto out; } prgetlwpstatus32(pnp->pr_common->prc_thread, sp, VTOZONE(PTOV(pnp))); prunlock(pnp); error = pr_uioread(sp, sizeof (*sp), uiop); out: kmem_free(sp, sizeof (*sp)); return (error); } static int pr_read_lwpsinfo_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { lwpsinfo32_t lwpsinfo; proc_t *p; kthread_t *t; lwpent_t *lep; ASSERT(pnp->pr_type == PR_LWPSINFO); /* * We don't want the full treatment of prlock(pnp) here. * This file is world-readable and never goes invalid. * It doesn't matter if we are in the middle of an exec(). */ p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) return (ENOENT); ASSERT(p == pnp->pr_common->prc_proc); if (pnp->pr_common->prc_tslot == -1) { prunlock(pnp); return (ENOENT); } if (uiop->uio_offset >= sizeof (lwpsinfo)) { prunlock(pnp); return (0); } if ((t = pnp->pr_common->prc_thread) != NULL) prgetlwpsinfo32(t, &lwpsinfo); else { lep = p->p_lwpdir[pnp->pr_common->prc_tslot].ld_entry; bzero(&lwpsinfo, sizeof (lwpsinfo)); lwpsinfo.pr_lwpid = lep->le_lwpid; lwpsinfo.pr_state = SZOMB; lwpsinfo.pr_sname = 'Z'; lwpsinfo.pr_start.tv_sec = (time32_t)lep->le_start; } prunlock(pnp); return (pr_uioread(&lwpsinfo, sizeof (lwpsinfo), uiop)); } static int pr_read_lwpusage_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { prhusage_t *pup; prusage32_t *upup; proc_t *p; int error; ASSERT(pnp->pr_type == PR_LWPUSAGE); /* allocate now, before locking the process */ pup = kmem_zalloc(sizeof (*pup), KM_SLEEP); upup = kmem_alloc(sizeof (*upup), KM_SLEEP); /* * We don't want the full treatment of prlock(pnp) here. * This file is world-readable and never goes invalid. * It doesn't matter if we are in the middle of an exec(). */ p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) { error = ENOENT; goto out; } ASSERT(p == pnp->pr_common->prc_proc); if (pnp->pr_common->prc_thread == NULL) { prunlock(pnp); error = ENOENT; goto out; } if (uiop->uio_offset >= sizeof (prusage32_t)) { prunlock(pnp); error = 0; goto out; } pup->pr_tstamp = gethrtime(); prgetusage(pnp->pr_common->prc_thread, pup); prunlock(pnp); prcvtusage32(pup, upup); error = pr_uioread(upup, sizeof (prusage32_t), uiop); out: kmem_free(pup, sizeof (*pup)); kmem_free(upup, sizeof (*upup)); return (error); } static int pr_read_spymaster_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { psinfo32_t psinfo; int error; klwp_t *lwp; ASSERT(pnp->pr_type == PR_SPYMASTER); if ((error = prlock(pnp, ZNO)) != 0) return (error); if (pnp->pr_common->prc_thread == NULL) { prunlock(pnp); return (0); } lwp = pnp->pr_common->prc_thread->t_lwp; if (lwp->lwp_spymaster == NULL) { prunlock(pnp); return (0); } psinfo_kto32(lwp->lwp_spymaster, &psinfo); prunlock(pnp); return (pr_uioread(&psinfo, sizeof (psinfo), uiop)); } #if defined(__sparc) static int pr_read_gwindows_32(prnode_t *pnp, uio_t *uiop, cred_t *cr) { proc_t *p; kthread_t *t; gwindows32_t *gwp; int error; size_t size; ASSERT(pnp->pr_type == PR_GWINDOWS); gwp = kmem_zalloc(sizeof (gwindows32_t), KM_SLEEP); if ((error = prlock(pnp, ZNO)) != 0) goto out; p = pnp->pr_common->prc_proc; t = pnp->pr_common->prc_thread; if (PROCESS_NOT_32BIT(p)) { prunlock(pnp); error = EOVERFLOW; goto out; } /* * Drop p->p_lock while touching the stack. * The P_PR_LOCK flag prevents the lwp from * disappearing while we do this. */ mutex_exit(&p->p_lock); if ((size = prnwindows(ttolwp(t))) != 0) size = sizeof (gwindows32_t) - (SPARC_MAXREGWINDOW - size) * sizeof (struct rwindow32); if (uiop->uio_offset >= size) { mutex_enter(&p->p_lock); prunlock(pnp); goto out; } prgetwindows32(ttolwp(t), gwp); mutex_enter(&p->p_lock); prunlock(pnp); error = pr_uioread(gwp, size, uiop); out: kmem_free(gwp, sizeof (gwindows32_t)); return (error); } #endif /* __sparc */ #endif /* _SYSCALL32_IMPL */ /* ARGSUSED */ static int prread(vnode_t *vp, uio_t *uiop, int ioflag, cred_t *cr, caller_context_t *ct) { prnode_t *pnp = VTOP(vp); ASSERT(pnp->pr_type < PR_NFILES); #ifdef _SYSCALL32_IMPL /* * What is read from the /proc files depends on the data * model of the caller. An LP64 process will see LP64 * data. An ILP32 process will see ILP32 data. */ if (curproc->p_model == DATAMODEL_LP64) return (pr_read_function[pnp->pr_type](pnp, uiop, cr)); else return (pr_read_function_32[pnp->pr_type](pnp, uiop, cr)); #else return (pr_read_function[pnp->pr_type](pnp, uiop, cr)); #endif } /* Note we intentionally don't handle partial writes/updates. */ static int pr_write_lwpname(prnode_t *pnp, uio_t *uiop) { kthread_t *t = NULL; char *lwpname; int error; lwpname = kmem_zalloc(THREAD_NAME_MAX, KM_SLEEP); if ((error = uiomove(lwpname, THREAD_NAME_MAX, UIO_WRITE, uiop)) != 0) { kmem_free(lwpname, THREAD_NAME_MAX); return (error); } /* Somebody tried to write too long a thread name... */ if (lwpname[THREAD_NAME_MAX - 1] != '\0' || uiop->uio_resid > 0) { kmem_free(lwpname, THREAD_NAME_MAX); return (EIO); } VERIFY3U(lwpname[THREAD_NAME_MAX - 1], ==, '\0'); for (size_t i = 0; lwpname[i] != '\0'; i++) { if (!ISPRINT(lwpname[i])) { kmem_free(lwpname, THREAD_NAME_MAX); return (EINVAL); } } /* Equivalent of thread_setname(), but with the ZNO magic. */ if ((error = prlock(pnp, ZNO)) != 0) { kmem_free(lwpname, THREAD_NAME_MAX); return (error); } t = pnp->pr_common->prc_thread; if (t->t_name == NULL) { t->t_name = lwpname; } else { (void) strlcpy(t->t_name, lwpname, THREAD_NAME_MAX); kmem_free(lwpname, THREAD_NAME_MAX); } prunlock(pnp); return (0); } /* ARGSUSED */ static int prwrite(vnode_t *vp, uio_t *uiop, int ioflag, cred_t *cr, caller_context_t *ct) { prnode_t *pnp = VTOP(vp); int old = 0; int error; ssize_t resid; ASSERT(pnp->pr_type < PR_NFILES); /* * Only a handful of /proc files are writable, enumerate them here. */ switch (pnp->pr_type) { case PR_PIDDIR: /* directory write()s: visceral revulsion. */ ASSERT(pnp->pr_pidfile != NULL); /* use the underlying PR_PIDFILE to write the process */ vp = pnp->pr_pidfile; pnp = VTOP(vp); ASSERT(pnp->pr_type == PR_PIDFILE); /* FALLTHROUGH */ case PR_PIDFILE: case PR_LWPIDFILE: old = 1; /* FALLTHROUGH */ case PR_AS: if ((error = prlock(pnp, ZNO)) == 0) { proc_t *p = pnp->pr_common->prc_proc; struct as *as = p->p_as; if ((p->p_flag & SSYS) || as == &kas) { /* * /proc I/O cannot be done to a system process. */ error = EIO; #ifdef _SYSCALL32_IMPL } else if (curproc->p_model == DATAMODEL_ILP32 && PROCESS_NOT_32BIT(p)) { error = EOVERFLOW; #endif } else { /* * See comments above (pr_read_pidfile) * about this locking dance. */ mutex_exit(&p->p_lock); error = prusrio(p, UIO_WRITE, uiop, old); mutex_enter(&p->p_lock); } prunlock(pnp); } return (error); case PR_CTL: case PR_LWPCTL: resid = uiop->uio_resid; /* * Perform the action on the control file * by passing curthreads credentials * and not target process's credentials. */ #ifdef _SYSCALL32_IMPL if (curproc->p_model == DATAMODEL_ILP32) error = prwritectl32(vp, uiop, CRED()); else error = prwritectl(vp, uiop, CRED()); #else error = prwritectl(vp, uiop, CRED()); #endif /* * This hack makes sure that the EINTR is passed * all the way back to the caller's write() call. */ if (error == EINTR) uiop->uio_resid = resid; return (error); case PR_LWPNAME: return (pr_write_lwpname(pnp, uiop)); default: return ((vp->v_type == VDIR)? EISDIR : EBADF); } /* NOTREACHED */ } static int prgetattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, caller_context_t *ct) { prnode_t *pnp = VTOP(vp); prnodetype_t type = pnp->pr_type; prcommon_t *pcp; proc_t *p; struct as *as; int error; vnode_t *rvp; timestruc_t now; extern uint_t nproc; int ngroups; int nsig; /* * This ugly bit of code allows us to keep both versions of this * function from the same source. */ #ifdef _LP64 int iam32bit = (curproc->p_model == DATAMODEL_ILP32); #define PR_OBJSIZE(obj32, obj64) \ (iam32bit ? sizeof (obj32) : sizeof (obj64)) #define PR_OBJSPAN(obj32, obj64) \ (iam32bit ? LSPAN32(obj32) : LSPAN(obj64)) #else #define PR_OBJSIZE(obj32, obj64) \ (sizeof (obj64)) #define PR_OBJSPAN(obj32, obj64) \ (LSPAN(obj64)) #endif /* * Return all the attributes. Should be refined * so that it returns only those asked for. * Most of this is complete fakery anyway. */ /* * For files in the /proc//object directory, * return the attributes of the underlying object. * For files in the /proc//fd directory, * return the attributes of the underlying file, but * make it look inaccessible if it is not a regular file. * Make directories look like symlinks. */ switch (type) { case PR_CURDIR: case PR_ROOTDIR: if (!(flags & ATTR_REAL)) break; /* restrict full knowledge of the attributes to owner or root */ if ((error = praccess(vp, 0, 0, cr, ct)) != 0) return (error); /* FALLTHROUGH */ case PR_OBJECT: case PR_FD: rvp = pnp->pr_realvp; error = VOP_GETATTR(rvp, vap, flags, cr, ct); if (error) return (error); if (type == PR_FD) { if (rvp->v_type != VREG && rvp->v_type != VDIR) vap->va_mode = 0; else vap->va_mode &= pnp->pr_mode; } if (type == PR_OBJECT) vap->va_mode &= 07555; if (rvp->v_type == VDIR && !(flags & ATTR_REAL)) { vap->va_type = VLNK; vap->va_size = 0; vap->va_nlink = 1; } return (0); default: break; } bzero(vap, sizeof (*vap)); /* * Large Files: Internally proc now uses VPROC to indicate * a proc file. Since we have been returning VREG through * VOP_GETATTR() until now, we continue to do this so as * not to break apps depending on this return value. */ vap->va_type = (vp->v_type == VPROC) ? VREG : vp->v_type; vap->va_mode = pnp->pr_mode; vap->va_fsid = vp->v_vfsp->vfs_dev; vap->va_blksize = DEV_BSIZE; vap->va_rdev = 0; vap->va_seq = 0; if (type == PR_PROCDIR) { vap->va_uid = 0; vap->va_gid = 0; vap->va_nlink = nproc + 2; vap->va_nodeid = (ino64_t)PRROOTINO; gethrestime(&now); vap->va_atime = vap->va_mtime = vap->va_ctime = now; vap->va_size = (v.v_proc + 2) * PRSDSIZE; vap->va_nblocks = btod(vap->va_size); return (0); } /* * /proc//self is a symbolic link, and has no prcommon member */ if (type == PR_SELF) { vap->va_uid = crgetruid(CRED()); vap->va_gid = crgetrgid(CRED()); vap->va_nodeid = (ino64_t)PR_SELF; gethrestime(&now); vap->va_atime = vap->va_mtime = vap->va_ctime = now; vap->va_nlink = 1; vap->va_type = VLNK; vap->va_size = 0; return (0); } p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) return (ENOENT); pcp = pnp->pr_common; mutex_enter(&p->p_crlock); vap->va_uid = crgetruid(p->p_cred); vap->va_gid = crgetrgid(p->p_cred); mutex_exit(&p->p_crlock); vap->va_nlink = 1; vap->va_nodeid = pnp->pr_ino? pnp->pr_ino : pmkino(pcp->prc_tslot, pcp->prc_slot, pnp->pr_type); if ((pcp->prc_flags & PRC_LWP) && pcp->prc_tslot != -1) { vap->va_atime.tv_sec = vap->va_mtime.tv_sec = vap->va_ctime.tv_sec = p->p_lwpdir[pcp->prc_tslot].ld_entry->le_start; vap->va_atime.tv_nsec = vap->va_mtime.tv_nsec = vap->va_ctime.tv_nsec = 0; } else { user_t *up = PTOU(p); vap->va_atime.tv_sec = vap->va_mtime.tv_sec = vap->va_ctime.tv_sec = up->u_start.tv_sec; vap->va_atime.tv_nsec = vap->va_mtime.tv_nsec = vap->va_ctime.tv_nsec = up->u_start.tv_nsec; } switch (type) { case PR_PIDDIR: /* va_nlink: count 'lwp', 'object' and 'fd' directory links */ vap->va_nlink = 5; vap->va_size = sizeof (piddir); break; case PR_OBJECTDIR: if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) vap->va_size = 2 * PRSDSIZE; else { mutex_exit(&p->p_lock); AS_LOCK_ENTER(as, RW_WRITER); if (as->a_updatedir) rebuild_objdir(as); vap->va_size = (as->a_sizedir + 2) * PRSDSIZE; AS_LOCK_EXIT(as); mutex_enter(&p->p_lock); } vap->va_nlink = 2; break; case PR_PATHDIR: if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) vap->va_size = (P_FINFO(p)->fi_nfiles + 4) * PRSDSIZE; else { mutex_exit(&p->p_lock); AS_LOCK_ENTER(as, RW_WRITER); if (as->a_updatedir) rebuild_objdir(as); vap->va_size = (as->a_sizedir + 4 + P_FINFO(p)->fi_nfiles) * PRSDSIZE; AS_LOCK_EXIT(as); mutex_enter(&p->p_lock); } vap->va_nlink = 2; break; case PR_PATH: case PR_CURDIR: case PR_ROOTDIR: case PR_CT: vap->va_type = VLNK; vap->va_size = 0; break; case PR_FDDIR: case PR_FDINFODIR: vap->va_nlink = 2; vap->va_size = (P_FINFO(p)->fi_nfiles + 2) * PRSDSIZE; break; case PR_FDINFO: { file_t *fp; vnode_t *vp; int fd = pnp->pr_index; fp = pr_getf(p, fd, NULL); if (fp == NULL) { prunlock(pnp); return (ENOENT); } vp = fp->f_vnode; VN_HOLD(vp); pr_releasef(p, fd); prunlock(pnp); vap->va_size = prgetfdinfosize(p, vp, cr); VN_RELE(vp); vap->va_nblocks = (fsblkcnt64_t)btod(vap->va_size); return (0); } case PR_LWPDIR: /* * va_nlink: count each lwp as a directory link. * va_size: size of p_lwpdir + 2 */ vap->va_nlink = p->p_lwpcnt + p->p_zombcnt + 2; vap->va_size = (p->p_lwpdir_sz + 2) * PRSDSIZE; break; case PR_LWPIDDIR: vap->va_nlink = 2; vap->va_size = sizeof (lwpiddir); break; case PR_CTDIR: vap->va_nlink = 2; vap->va_size = (avl_numnodes(&p->p_ct_held) + 2) * PRSDSIZE; break; case PR_TMPLDIR: vap->va_nlink = 2; vap->va_size = (ct_ntypes + 2) * PRSDSIZE; break; case PR_AS: case PR_PIDFILE: case PR_LWPIDFILE: if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) vap->va_size = 0; else vap->va_size = as->a_resvsize; break; case PR_STATUS: vap->va_size = PR_OBJSIZE(pstatus32_t, pstatus_t); break; case PR_LSTATUS: vap->va_size = PR_OBJSIZE(prheader32_t, prheader_t) + p->p_lwpcnt * PR_OBJSPAN(lwpstatus32_t, lwpstatus_t); break; case PR_PSINFO: vap->va_size = PR_OBJSIZE(psinfo32_t, psinfo_t); break; case PR_LPSINFO: vap->va_size = PR_OBJSIZE(prheader32_t, prheader_t) + (p->p_lwpcnt + p->p_zombcnt) * PR_OBJSPAN(lwpsinfo32_t, lwpsinfo_t); break; case PR_MAP: case PR_RMAP: case PR_XMAP: if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) vap->va_size = 0; else { mutex_exit(&p->p_lock); AS_LOCK_ENTER(as, RW_WRITER); if (type == PR_MAP) vap->va_mtime = as->a_updatetime; if (type == PR_XMAP) vap->va_size = prnsegs(as, 0) * PR_OBJSIZE(prxmap32_t, prxmap_t); else vap->va_size = prnsegs(as, type == PR_RMAP) * PR_OBJSIZE(prmap32_t, prmap_t); AS_LOCK_EXIT(as); mutex_enter(&p->p_lock); } break; case PR_CRED: mutex_enter(&p->p_crlock); vap->va_size = sizeof (prcred_t); ngroups = crgetngroups(p->p_cred); if (ngroups > 1) vap->va_size += (ngroups - 1) * sizeof (gid_t); mutex_exit(&p->p_crlock); break; case PR_PRIV: vap->va_size = prgetprivsize(); break; case PR_SECFLAGS: vap->va_size = sizeof (prsecflags_t); break; case PR_SIGACT: nsig = PROC_IS_BRANDED(curproc)? BROP(curproc)->b_nsig : NSIG; vap->va_size = (nsig-1) * PR_OBJSIZE(struct sigaction32, struct sigaction); break; case PR_AUXV: vap->va_size = __KERN_NAUXV_IMPL * PR_OBJSIZE(auxv32_t, auxv_t); break; #if defined(__x86) case PR_LDT: mutex_exit(&p->p_lock); mutex_enter(&p->p_ldtlock); vap->va_size = prnldt(p) * sizeof (struct ssd); mutex_exit(&p->p_ldtlock); mutex_enter(&p->p_lock); break; #endif case PR_USAGE: vap->va_size = PR_OBJSIZE(prusage32_t, prusage_t); break; case PR_LUSAGE: vap->va_size = PR_OBJSIZE(prheader32_t, prheader_t) + (p->p_lwpcnt + 1) * PR_OBJSPAN(prusage32_t, prusage_t); break; case PR_PAGEDATA: if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) vap->va_size = 0; else { /* * We can drop p->p_lock before grabbing the * address space lock because p->p_as will not * change while the process is marked P_PR_LOCK. */ mutex_exit(&p->p_lock); AS_LOCK_ENTER(as, RW_WRITER); #ifdef _LP64 vap->va_size = iam32bit? prpdsize32(as) : prpdsize(as); #else vap->va_size = prpdsize(as); #endif AS_LOCK_EXIT(as); mutex_enter(&p->p_lock); } break; case PR_OPAGEDATA: if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) vap->va_size = 0; else { mutex_exit(&p->p_lock); AS_LOCK_ENTER(as, RW_WRITER); #ifdef _LP64 vap->va_size = iam32bit? oprpdsize32(as) : oprpdsize(as); #else vap->va_size = oprpdsize(as); #endif AS_LOCK_EXIT(as); mutex_enter(&p->p_lock); } break; case PR_WATCH: vap->va_size = avl_numnodes(&p->p_warea) * PR_OBJSIZE(prwatch32_t, prwatch_t); break; case PR_LWPSTATUS: vap->va_size = PR_OBJSIZE(lwpstatus32_t, lwpstatus_t); break; case PR_LWPSINFO: vap->va_size = PR_OBJSIZE(lwpsinfo32_t, lwpsinfo_t); break; case PR_LWPUSAGE: vap->va_size = PR_OBJSIZE(prusage32_t, prusage_t); break; case PR_XREGS: if (prhasx(p)) vap->va_size = prgetprxregsize(p); else vap->va_size = 0; break; case PR_SPYMASTER: if (pnp->pr_common->prc_thread != NULL && pnp->pr_common->prc_thread->t_lwp->lwp_spymaster != NULL) { vap->va_size = PR_OBJSIZE(psinfo32_t, psinfo_t); } else { vap->va_size = 0; } break; #if defined(__sparc) case PR_GWINDOWS: { kthread_t *t; int n; /* * If there is no lwp then just make the size zero. * This can happen if the lwp exits between the VOP_LOOKUP() * of the /proc//lwp//gwindows file and the * VOP_GETATTR() of the resulting vnode. */ if ((t = pcp->prc_thread) == NULL) { vap->va_size = 0; break; } /* * Drop p->p_lock while touching the stack. * The P_PR_LOCK flag prevents the lwp from * disappearing while we do this. */ mutex_exit(&p->p_lock); if ((n = prnwindows(ttolwp(t))) == 0) vap->va_size = 0; else vap->va_size = PR_OBJSIZE(gwindows32_t, gwindows_t) - (SPARC_MAXREGWINDOW - n) * PR_OBJSIZE(struct rwindow32, struct rwindow); mutex_enter(&p->p_lock); break; } case PR_ASRS: #ifdef _LP64 if (p->p_model == DATAMODEL_LP64) vap->va_size = sizeof (asrset_t); else #endif vap->va_size = 0; break; #endif case PR_CTL: case PR_LWPCTL: default: vap->va_size = 0; break; } prunlock(pnp); vap->va_nblocks = (fsblkcnt64_t)btod(vap->va_size); return (0); } static int praccess(vnode_t *vp, int mode, int flags, cred_t *cr, caller_context_t *ct) { prnode_t *pnp = VTOP(vp); prnodetype_t type = pnp->pr_type; int vmode; vtype_t vtype; proc_t *p; int error = 0; vnode_t *rvp; vnode_t *xvp; if ((mode & VWRITE) && vn_is_readonly(vp)) return (EROFS); switch (type) { case PR_PROCDIR: break; case PR_OBJECT: case PR_FD: /* * Disallow write access to the underlying objects. * Disallow access to underlying non-regular-file fds. * Disallow access to fds with other than existing open modes. */ rvp = pnp->pr_realvp; vtype = rvp->v_type; vmode = pnp->pr_mode; if ((type == PR_OBJECT && (mode & VWRITE)) || (type == PR_FD && vtype != VREG && vtype != VDIR) || (type == PR_FD && (vmode & mode) != mode && secpolicy_proc_access(cr) != 0)) return (EACCES); return (VOP_ACCESS(rvp, mode, flags, cr, ct)); case PR_PSINFO: /* these files can be read by anyone */ case PR_LPSINFO: case PR_LWPSINFO: case PR_LWPDIR: case PR_LWPIDDIR: case PR_USAGE: case PR_LUSAGE: case PR_LWPUSAGE: p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) return (ENOENT); prunlock(pnp); break; default: /* * Except for the world-readable files above, * only /proc/pid exists if the process is a zombie. */ if ((error = prlock(pnp, (type == PR_PIDDIR)? ZYES : ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; if (p != curproc) error = priv_proc_cred_perm(cr, p, NULL, mode); if (error != 0 || p == curproc || (p->p_flag & SSYS) || p->p_as == &kas || (xvp = p->p_exec) == NULL) { prunlock(pnp); } else { /* * Determine if the process's executable is readable. * We have to drop p->p_lock before the secpolicy * and VOP operation. */ VN_HOLD(xvp); prunlock(pnp); if (secpolicy_proc_access(cr) != 0) error = VOP_ACCESS(xvp, VREAD, 0, cr, ct); VN_RELE(xvp); } if (error) return (error); break; } if (type == PR_CURDIR || type == PR_ROOTDIR) { /* * Final access check on the underlying directory vnode. */ return (VOP_ACCESS(pnp->pr_realvp, mode, flags, cr, ct)); } /* * Visceral revulsion: For compatibility with old /proc, * allow the /proc/ directory to be opened for writing. */ vmode = pnp->pr_mode; if (type == PR_PIDDIR) vmode |= VWRITE; if ((vmode & mode) != mode) error = secpolicy_proc_access(cr); return (error); } /* * Array of lookup functions, indexed by /proc file type. */ static vnode_t *pr_lookup_notdir(), *pr_lookup_procdir(), *pr_lookup_piddir(), *pr_lookup_objectdir(), *pr_lookup_lwpdir(), *pr_lookup_lwpiddir(), *pr_lookup_fddir(), *pr_lookup_fdinfodir(), *pr_lookup_pathdir(), *pr_lookup_tmpldir(), *pr_lookup_ctdir(); static vnode_t *(*pr_lookup_function[PR_NFILES])() = { pr_lookup_procdir, /* /proc */ pr_lookup_notdir, /* /proc/self */ pr_lookup_piddir, /* /proc/ */ pr_lookup_notdir, /* /proc//as */ pr_lookup_notdir, /* /proc//ctl */ pr_lookup_notdir, /* /proc//status */ pr_lookup_notdir, /* /proc//lstatus */ pr_lookup_notdir, /* /proc//psinfo */ pr_lookup_notdir, /* /proc//lpsinfo */ pr_lookup_notdir, /* /proc//map */ pr_lookup_notdir, /* /proc//rmap */ pr_lookup_notdir, /* /proc//xmap */ pr_lookup_notdir, /* /proc//cred */ pr_lookup_notdir, /* /proc//sigact */ pr_lookup_notdir, /* /proc//auxv */ #if defined(__x86) pr_lookup_notdir, /* /proc//ldt */ #endif pr_lookup_notdir, /* /proc//usage */ pr_lookup_notdir, /* /proc//lusage */ pr_lookup_notdir, /* /proc//pagedata */ pr_lookup_notdir, /* /proc//watch */ pr_lookup_notdir, /* /proc//cwd */ pr_lookup_notdir, /* /proc//root */ pr_lookup_fddir, /* /proc//fd */ pr_lookup_notdir, /* /proc//fd/nn */ pr_lookup_fdinfodir, /* /proc//fdinfo */ pr_lookup_notdir, /* /proc//fdinfo/nn */ pr_lookup_objectdir, /* /proc//object */ pr_lookup_notdir, /* /proc//object/xxx */ pr_lookup_lwpdir, /* /proc//lwp */ pr_lookup_lwpiddir, /* /proc//lwp/ */ pr_lookup_notdir, /* /proc//lwp//lwpctl */ pr_lookup_notdir, /* /proc//lwp//lwpname */ pr_lookup_notdir, /* /proc//lwp//lwpstatus */ pr_lookup_notdir, /* /proc//lwp//lwpsinfo */ pr_lookup_notdir, /* /proc//lwp//lwpusage */ pr_lookup_notdir, /* /proc//lwp//xregs */ pr_lookup_tmpldir, /* /proc//lwp//templates */ pr_lookup_notdir, /* /proc//lwp//templates/ */ pr_lookup_notdir, /* /proc//lwp//spymaster */ #if defined(__sparc) pr_lookup_notdir, /* /proc//lwp//gwindows */ pr_lookup_notdir, /* /proc//lwp//asrs */ #endif pr_lookup_notdir, /* /proc//priv */ pr_lookup_pathdir, /* /proc//path */ pr_lookup_notdir, /* /proc//path/xxx */ pr_lookup_ctdir, /* /proc//contracts */ pr_lookup_notdir, /* /proc//contracts/ */ pr_lookup_notdir, /* /proc//secflags */ pr_lookup_notdir, /* old process file */ pr_lookup_notdir, /* old lwp file */ pr_lookup_notdir, /* old pagedata file */ }; static int prlookup(vnode_t *dp, char *comp, vnode_t **vpp, pathname_t *pathp, int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct, int *direntflags, pathname_t *realpnp) { prnode_t *pnp = VTOP(dp); prnodetype_t type = pnp->pr_type; int error; ASSERT(dp->v_type == VDIR); ASSERT(type < PR_NFILES); if (type != PR_PROCDIR && strcmp(comp, "..") == 0) { VN_HOLD(pnp->pr_parent); *vpp = pnp->pr_parent; return (0); } if (*comp == '\0' || strcmp(comp, ".") == 0 || strcmp(comp, "..") == 0) { VN_HOLD(dp); *vpp = dp; return (0); } switch (type) { case PR_CURDIR: case PR_ROOTDIR: /* restrict lookup permission to owner or root */ if ((error = praccess(dp, VEXEC, 0, cr, ct)) != 0) return (error); /* FALLTHROUGH */ case PR_FD: /* * Performing a VOP_LOOKUP on the underlying vnode and emitting * the resulting vnode, without encapsulation, as our own is a * very special case when it comes to the assumptions built * into VFS. * * Since the resulting vnode is highly likely to be at some * abitrary position in another filesystem, we insist that the * VTRAVERSE flag is set on the parent. This prevents things * such as the v_path freshness logic from mistaking the * resulting vnode as a "real" child of the parent, rather than * a consequence of this "procfs wormhole". * * Failure to establish such protections can lead to * incorrectly calculated v_paths being set on nodes reached * through these lookups. */ ASSERT((dp->v_flag & VTRAVERSE) != 0); dp = pnp->pr_realvp; return (VOP_LOOKUP(dp, comp, vpp, pathp, flags, rdir, cr, ct, direntflags, realpnp)); default: break; } if ((type == PR_OBJECTDIR || type == PR_FDDIR || type == PR_FDINFODIR || type == PR_PATHDIR) && (error = praccess(dp, VEXEC, 0, cr, ct)) != 0) return (error); /* XXX - Do we need to pass ct, direntflags, or realpnp? */ *vpp = (pr_lookup_function[type](dp, comp)); return ((*vpp == NULL) ? ENOENT : 0); } /* ARGSUSED */ static int prcreate(vnode_t *dp, char *comp, vattr_t *vap, vcexcl_t excl, int mode, vnode_t **vpp, cred_t *cr, int flag, caller_context_t *ct, vsecattr_t *vsecp) { int error; if ((error = prlookup(dp, comp, vpp, NULL, 0, NULL, cr, ct, NULL, NULL)) != 0) { if (error == ENOENT) { /* One can't O_CREAT nonexistent files in /proc. */ error = EACCES; } return (error); } if (excl == EXCL) { /* Disallow the O_EXCL case */ error = EEXIST; } else if ((error = praccess(*vpp, mode, 0, cr, ct)) == 0) { /* Before proceeding, handle O_TRUNC if necessary. */ if (vap->va_mask & AT_SIZE) { vnode_t *vp = *vpp; if (vp->v_type == VDIR) { /* Only allow O_TRUNC on files */ error = EISDIR; } else if (vp->v_type != VPROC || VTOP(vp)->pr_type != PR_FD) { /* * Disallow for files outside of the * /proc//fd/ entries */ error = EACCES; } else { uint_t mask; vp = VTOP(vp)->pr_realvp; mask = vap->va_mask; vap->va_mask = AT_SIZE; error = VOP_SETATTR(vp, vap, 0, cr, ct); vap->va_mask = mask; } } } if (error) { VN_RELE(*vpp); *vpp = NULL; } return (error); } /* ARGSUSED */ static vnode_t * pr_lookup_notdir(vnode_t *dp, char *comp) { return (NULL); } /* * Find or construct a process vnode for the given pid. */ static vnode_t * pr_lookup_procdir(vnode_t *dp, char *comp) { pid_t pid; prnode_t *pnp; prcommon_t *pcp; vnode_t *vp; proc_t *p; int c; ASSERT(VTOP(dp)->pr_type == PR_PROCDIR); if (strcmp(comp, "self") == 0) { pnp = prgetnode(dp, PR_SELF); return (PTOV(pnp)); } else { pid = 0; while ((c = *comp++) != '\0') { if (c < '0' || c > '9') return (NULL); pid = 10*pid + c - '0'; if (pid > maxpid) return (NULL); } } pnp = prgetnode(dp, PR_PIDDIR); mutex_enter(&pidlock); if ((p = prfind(pid)) == NULL || p->p_stat == SIDL) { mutex_exit(&pidlock); prfreenode(pnp); return (NULL); } ASSERT(p->p_stat != 0); /* NOTE: we're holding pidlock across the policy call. */ if (secpolicy_basic_procinfo(CRED(), p, curproc) != 0) { mutex_exit(&pidlock); prfreenode(pnp); return (NULL); } mutex_enter(&p->p_lock); mutex_exit(&pidlock); /* * If a process vnode already exists and it is not invalid * and it was created by the current process and it belongs * to the same /proc mount point as our parent vnode, then * just use it and discard the newly-allocated prnode. */ for (vp = p->p_trace; vp != NULL; vp = VTOP(vp)->pr_next) { if (!(VTOP(VTOP(vp)->pr_pidfile)->pr_flags & PR_INVAL) && VTOP(vp)->pr_owner == curproc && vp->v_vfsp == dp->v_vfsp) { ASSERT(!(VTOP(vp)->pr_flags & PR_INVAL)); VN_HOLD(vp); prfreenode(pnp); mutex_exit(&p->p_lock); return (vp); } } pnp->pr_owner = curproc; /* * prgetnode() initialized most of the prnode. * Finish the job. */ pcp = pnp->pr_common; /* the newly-allocated prcommon struct */ if ((vp = p->p_trace) != NULL) { /* discard the new prcommon and use the existing prcommon */ prfreecommon(pcp); pcp = VTOP(vp)->pr_common; mutex_enter(&pcp->prc_mutex); ASSERT(pcp->prc_refcnt > 0); pcp->prc_refcnt++; mutex_exit(&pcp->prc_mutex); pnp->pr_common = pcp; } else { /* initialize the new prcommon struct */ if ((p->p_flag & SSYS) || p->p_as == &kas) pcp->prc_flags |= PRC_SYS; if (p->p_stat == SZOMB || (p->p_flag & SEXITING) != 0) pcp->prc_flags |= PRC_DESTROY; pcp->prc_proc = p; pcp->prc_datamodel = p->p_model; pcp->prc_pid = p->p_pid; pcp->prc_slot = p->p_slot; } pnp->pr_pcommon = pcp; pnp->pr_parent = dp; VN_HOLD(dp); /* * Link in the old, invalid directory vnode so we * can later determine the last close of the file. */ pnp->pr_next = p->p_trace; p->p_trace = dp = PTOV(pnp); /* * Kludge for old /proc: initialize the PR_PIDFILE as well. */ vp = pnp->pr_pidfile; pnp = VTOP(vp); pnp->pr_ino = ptoi(pcp->prc_pid); pnp->pr_common = pcp; pnp->pr_pcommon = pcp; pnp->pr_parent = dp; pnp->pr_next = p->p_plist; p->p_plist = vp; mutex_exit(&p->p_lock); return (dp); } static vnode_t * pr_lookup_piddir(vnode_t *dp, char *comp) { prnode_t *dpnp = VTOP(dp); vnode_t *vp; prnode_t *pnp; proc_t *p; user_t *up; prdirent_t *dirp; int i; enum prnodetype type; ASSERT(dpnp->pr_type == PR_PIDDIR); for (i = 0; i < NPIDDIRFILES; i++) { /* Skip "." and ".." */ dirp = &piddir[i+2]; if (strcmp(comp, dirp->d_name) == 0) break; } if (i >= NPIDDIRFILES) return (NULL); type = (int)dirp->d_ino; pnp = prgetnode(dp, type); p = pr_p_lock(dpnp); mutex_exit(&pr_pidlock); if (p == NULL) { prfreenode(pnp); return (NULL); } if (dpnp->pr_pcommon->prc_flags & PRC_DESTROY) { switch (type) { case PR_PSINFO: case PR_USAGE: break; default: prunlock(dpnp); prfreenode(pnp); return (NULL); } } switch (type) { case PR_CURDIR: case PR_ROOTDIR: up = PTOU(p); vp = (type == PR_CURDIR)? up->u_cdir : (up->u_rdir? up->u_rdir : rootdir); if (vp == NULL) { /* can't happen(?) */ prunlock(dpnp); prfreenode(pnp); return (NULL); } /* * Fill in the prnode so future references will * be able to find the underlying object's vnode. */ VN_HOLD(vp); pnp->pr_realvp = vp; PTOV(pnp)->v_flag |= VTRAVERSE; break; default: break; } mutex_enter(&dpnp->pr_mutex); if ((vp = dpnp->pr_files[i]) != NULL && !(VTOP(vp)->pr_flags & PR_INVAL)) { VN_HOLD(vp); mutex_exit(&dpnp->pr_mutex); prunlock(dpnp); prfreenode(pnp); return (vp); } /* * prgetnode() initialized most of the prnode. * Finish the job. */ pnp->pr_common = dpnp->pr_common; pnp->pr_pcommon = dpnp->pr_pcommon; pnp->pr_parent = dp; VN_HOLD(dp); pnp->pr_index = i; dpnp->pr_files[i] = vp = PTOV(pnp); /* * Link new vnode into list of all /proc vnodes for the process. */ if (vp->v_type == VPROC) { pnp->pr_next = p->p_plist; p->p_plist = vp; } mutex_exit(&dpnp->pr_mutex); prunlock(dpnp); return (vp); } static vnode_t * pr_lookup_objectdir(vnode_t *dp, char *comp) { prnode_t *dpnp = VTOP(dp); prnode_t *pnp; proc_t *p; struct seg *seg; struct as *as; vnode_t *vp; vattr_t vattr; ASSERT(dpnp->pr_type == PR_OBJECTDIR); pnp = prgetnode(dp, PR_OBJECT); if (prlock(dpnp, ZNO) != 0) { prfreenode(pnp); return (NULL); } p = dpnp->pr_common->prc_proc; if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) { prunlock(dpnp); prfreenode(pnp); return (NULL); } /* * We drop p_lock before grabbing the address space lock * in order to avoid a deadlock with the clock thread. * The process will not disappear and its address space * will not change because it is marked P_PR_LOCK. */ mutex_exit(&p->p_lock); AS_LOCK_ENTER(as, RW_READER); if ((seg = AS_SEGFIRST(as)) == NULL) { vp = NULL; goto out; } if (strcmp(comp, "a.out") == 0) { vp = p->p_exec; goto out; } do { /* * Manufacture a filename for the "object" directory. */ vattr.va_mask = AT_FSID|AT_NODEID; if (seg->s_ops == &segvn_ops && SEGOP_GETVP(seg, seg->s_base, &vp) == 0 && vp != NULL && vp->v_type == VREG && VOP_GETATTR(vp, &vattr, 0, CRED(), NULL) == 0) { char name[64]; if (vp == p->p_exec) /* "a.out" */ continue; pr_object_name(name, vp, &vattr); if (strcmp(name, comp) == 0) goto out; } } while ((seg = AS_SEGNEXT(as, seg)) != NULL); vp = NULL; out: if (vp != NULL) { VN_HOLD(vp); } AS_LOCK_EXIT(as); mutex_enter(&p->p_lock); prunlock(dpnp); if (vp == NULL) prfreenode(pnp); else { /* * Fill in the prnode so future references will * be able to find the underlying object's vnode. * Don't link this prnode into the list of all * prnodes for the process; this is a one-use node. * Its use is entirely to catch and fail opens for writing. */ pnp->pr_realvp = vp; vp = PTOV(pnp); } return (vp); } /* * Find or construct an lwp vnode for the given lwpid. */ static vnode_t * pr_lookup_lwpdir(vnode_t *dp, char *comp) { id_t tid; /* same type as t->t_tid */ int want_agent; prnode_t *dpnp = VTOP(dp); prnode_t *pnp; prcommon_t *pcp; vnode_t *vp; proc_t *p; kthread_t *t; lwpdir_t *ldp; lwpent_t *lep; int tslot; int c; ASSERT(dpnp->pr_type == PR_LWPDIR); tid = 0; if (strcmp(comp, "agent") == 0) want_agent = 1; else { want_agent = 0; while ((c = *comp++) != '\0') { id_t otid; if (c < '0' || c > '9') return (NULL); otid = tid; tid = 10*tid + c - '0'; if (tid/10 != otid) /* integer overflow */ return (NULL); } } pnp = prgetnode(dp, PR_LWPIDDIR); p = pr_p_lock(dpnp); mutex_exit(&pr_pidlock); if (p == NULL) { prfreenode(pnp); return (NULL); } if (want_agent) { if ((t = p->p_agenttp) == NULL) lep = NULL; else { tid = t->t_tid; tslot = t->t_dslot; lep = p->p_lwpdir[tslot].ld_entry; } } else { if ((ldp = lwp_hash_lookup(p, tid)) == NULL) lep = NULL; else { tslot = (int)(ldp - p->p_lwpdir); lep = ldp->ld_entry; } } if (lep == NULL) { prunlock(dpnp); prfreenode(pnp); return (NULL); } /* * If an lwp vnode already exists and it is not invalid * and it was created by the current process and it belongs * to the same /proc mount point as our parent vnode, then * just use it and discard the newly-allocated prnode. */ for (vp = lep->le_trace; vp != NULL; vp = VTOP(vp)->pr_next) { if (!(VTOP(vp)->pr_flags & PR_INVAL) && VTOP(vp)->pr_owner == curproc && vp->v_vfsp == dp->v_vfsp) { VN_HOLD(vp); prunlock(dpnp); prfreenode(pnp); return (vp); } } pnp->pr_owner = curproc; /* * prgetnode() initialized most of the prnode. * Finish the job. */ pcp = pnp->pr_common; /* the newly-allocated prcommon struct */ if ((vp = lep->le_trace) != NULL) { /* discard the new prcommon and use the existing prcommon */ prfreecommon(pcp); pcp = VTOP(vp)->pr_common; mutex_enter(&pcp->prc_mutex); ASSERT(pcp->prc_refcnt > 0); pcp->prc_refcnt++; mutex_exit(&pcp->prc_mutex); pnp->pr_common = pcp; } else { /* initialize the new prcommon struct */ pcp->prc_flags |= PRC_LWP; if ((p->p_flag & SSYS) || p->p_as == &kas) pcp->prc_flags |= PRC_SYS; if ((t = lep->le_thread) == NULL) pcp->prc_flags |= PRC_DESTROY; pcp->prc_proc = p; pcp->prc_datamodel = dpnp->pr_pcommon->prc_datamodel; pcp->prc_pid = p->p_pid; pcp->prc_slot = p->p_slot; pcp->prc_thread = t; pcp->prc_tid = tid; pcp->prc_tslot = tslot; } pnp->pr_pcommon = dpnp->pr_pcommon; pnp->pr_parent = dp; VN_HOLD(dp); /* * Link in the old, invalid directory vnode so we * can later determine the last close of the file. */ pnp->pr_next = lep->le_trace; lep->le_trace = vp = PTOV(pnp); prunlock(dpnp); return (vp); } static vnode_t * pr_lookup_lwpiddir(vnode_t *dp, char *comp) { prnode_t *dpnp = VTOP(dp); vnode_t *vp; prnode_t *pnp; proc_t *p; prdirent_t *dirp; int i; enum prnodetype type; ASSERT(dpnp->pr_type == PR_LWPIDDIR); for (i = 0; i < NLWPIDDIRFILES; i++) { /* Skip "." and ".." */ dirp = &lwpiddir[i+2]; if (strcmp(comp, dirp->d_name) == 0) break; } if (i >= NLWPIDDIRFILES) return (NULL); type = (int)dirp->d_ino; pnp = prgetnode(dp, type); p = pr_p_lock(dpnp); mutex_exit(&pr_pidlock); if (p == NULL) { prfreenode(pnp); return (NULL); } if (dpnp->pr_common->prc_flags & PRC_DESTROY) { /* * Only the lwpsinfo file is present for zombie lwps. * Nothing is present if the lwp has been reaped. */ if (dpnp->pr_common->prc_tslot == -1 || type != PR_LWPSINFO) { prunlock(dpnp); prfreenode(pnp); return (NULL); } } #if defined(__sparc) /* the asrs file exists only for sparc v9 _LP64 processes */ if (type == PR_ASRS && p->p_model != DATAMODEL_LP64) { prunlock(dpnp); prfreenode(pnp); return (NULL); } #endif mutex_enter(&dpnp->pr_mutex); if ((vp = dpnp->pr_files[i]) != NULL && !(VTOP(vp)->pr_flags & PR_INVAL)) { VN_HOLD(vp); mutex_exit(&dpnp->pr_mutex); prunlock(dpnp); prfreenode(pnp); return (vp); } /* * prgetnode() initialized most of the prnode. * Finish the job. */ pnp->pr_common = dpnp->pr_common; pnp->pr_pcommon = dpnp->pr_pcommon; pnp->pr_parent = dp; VN_HOLD(dp); pnp->pr_index = i; dpnp->pr_files[i] = vp = PTOV(pnp); /* * Link new vnode into list of all /proc vnodes for the process. */ if (vp->v_type == VPROC) { pnp->pr_next = p->p_plist; p->p_plist = vp; } mutex_exit(&dpnp->pr_mutex); prunlock(dpnp); return (vp); } /* * Lookup one of the process's open files. */ static vnode_t * pr_lookup_fddir(vnode_t *dp, char *comp) { prnode_t *dpnp = VTOP(dp); prnode_t *pnp; vnode_t *vp = NULL; proc_t *p; file_t *fp; uint_t fd; int c; ASSERT(dpnp->pr_type == PR_FDDIR); fd = 0; while ((c = *comp++) != '\0') { int ofd; if (c < '0' || c > '9') return (NULL); ofd = fd; fd = 10 * fd + c - '0'; if (fd / 10 != ofd) /* integer overflow */ return (NULL); } pnp = prgetnode(dp, PR_FD); if (prlock(dpnp, ZNO) != 0) { prfreenode(pnp); return (NULL); } p = dpnp->pr_common->prc_proc; if ((p->p_flag & SSYS) || p->p_as == &kas) { prunlock(dpnp); prfreenode(pnp); return (NULL); } if ((fp = pr_getf(p, fd, NULL)) != NULL) { pnp->pr_mode = 07111; if (fp->f_flag & FREAD) pnp->pr_mode |= 0444; if (fp->f_flag & FWRITE) pnp->pr_mode |= 0222; vp = fp->f_vnode; VN_HOLD(vp); pr_releasef(p, fd); } prunlock(dpnp); if (vp == NULL) { prfreenode(pnp); return (NULL); } /* * Fill in the prnode so future references will * be able to find the underlying object's vnode. * Don't link this prnode into the list of all * prnodes for the process; this is a one-use node. */ pnp->pr_realvp = vp; pnp->pr_parent = dp; /* needed for prlookup */ VN_HOLD(dp); vp = PTOV(pnp); if (pnp->pr_realvp->v_type == VDIR) { vp->v_type = VDIR; vp->v_flag |= VTRAVERSE; } return (vp); } static vnode_t * pr_lookup_fdinfodir(vnode_t *dp, char *comp) { prnode_t *dpnp = VTOP(dp); prnode_t *pnp; vnode_t *vp = NULL; proc_t *p; uint_t fd; int c; ASSERT(dpnp->pr_type == PR_FDINFODIR); fd = 0; while ((c = *comp++) != '\0') { int ofd; if (c < '0' || c > '9') return (NULL); ofd = fd; fd = 10 * fd + c - '0'; if (fd / 10 != ofd) /* integer overflow */ return (NULL); } pnp = prgetnode(dp, PR_FDINFO); if (prlock(dpnp, ZNO) != 0) { prfreenode(pnp); return (NULL); } p = dpnp->pr_common->prc_proc; if ((p->p_flag & SSYS) || p->p_as == &kas) { prunlock(dpnp); prfreenode(pnp); return (NULL); } /* * Don't link this prnode into the list of all * prnodes for the process; this is a one-use node. * Unlike the FDDIR case, the underlying vnode is not stored in * pnp->pr_realvp. Instead, the fd number is stored in pnp->pr_index * and used by pr_read_fdinfo() to return information for the right * file descriptor. */ pnp->pr_common = dpnp->pr_common; pnp->pr_pcommon = dpnp->pr_pcommon; pnp->pr_parent = dp; pnp->pr_index = fd; VN_HOLD(dp); prunlock(dpnp); vp = PTOV(pnp); return (vp); } static vnode_t * pr_lookup_pathdir(vnode_t *dp, char *comp) { prnode_t *dpnp = VTOP(dp); prnode_t *pnp; vnode_t *vp = NULL; proc_t *p; uint_t fd, flags = 0; int c; uf_entry_t *ufp; uf_info_t *fip; enum { NAME_FD, NAME_OBJECT, NAME_ROOT, NAME_CWD, NAME_UNKNOWN } type; char *tmp; int idx; struct seg *seg; struct as *as = NULL; vattr_t vattr; ASSERT(dpnp->pr_type == PR_PATHDIR); /* * First, check if this is a numeric entry, in which case we have a * file descriptor. */ fd = 0; type = NAME_FD; tmp = comp; while ((c = *tmp++) != '\0') { int ofd; if (c < '0' || c > '9') { type = NAME_UNKNOWN; break; } ofd = fd; fd = 10*fd + c - '0'; if (fd/10 != ofd) { /* integer overflow */ type = NAME_UNKNOWN; break; } } /* * Next, see if it is one of the special values {root, cwd}. */ if (type == NAME_UNKNOWN) { if (strcmp(comp, "root") == 0) type = NAME_ROOT; else if (strcmp(comp, "cwd") == 0) type = NAME_CWD; } /* * Grab the necessary data from the process */ if (prlock(dpnp, ZNO) != 0) return (NULL); p = dpnp->pr_common->prc_proc; fip = P_FINFO(p); switch (type) { case NAME_ROOT: if ((vp = PTOU(p)->u_rdir) == NULL) vp = p->p_zone->zone_rootvp; VN_HOLD(vp); break; case NAME_CWD: vp = PTOU(p)->u_cdir; VN_HOLD(vp); break; default: if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) { prunlock(dpnp); return (NULL); } } mutex_exit(&p->p_lock); /* * Determine if this is an object entry */ if (type == NAME_UNKNOWN) { /* * Start with the inode index immediately after the number of * files. */ mutex_enter(&fip->fi_lock); idx = fip->fi_nfiles + 4; mutex_exit(&fip->fi_lock); if (strcmp(comp, "a.out") == 0) { if (p->p_execdir != NULL) { vp = p->p_execdir; VN_HOLD(vp); type = NAME_OBJECT; flags |= PR_AOUT; } else { vp = p->p_exec; VN_HOLD(vp); type = NAME_OBJECT; } } else { AS_LOCK_ENTER(as, RW_READER); if ((seg = AS_SEGFIRST(as)) != NULL) { do { /* * Manufacture a filename for the * "object" directory. */ vattr.va_mask = AT_FSID|AT_NODEID; if (seg->s_ops == &segvn_ops && SEGOP_GETVP(seg, seg->s_base, &vp) == 0 && vp != NULL && vp->v_type == VREG && VOP_GETATTR(vp, &vattr, 0, CRED(), NULL) == 0) { char name[64]; if (vp == p->p_exec) continue; idx++; pr_object_name(name, vp, &vattr); if (strcmp(name, comp) == 0) break; } } while ((seg = AS_SEGNEXT(as, seg)) != NULL); } if (seg == NULL) { vp = NULL; } else { VN_HOLD(vp); type = NAME_OBJECT; } AS_LOCK_EXIT(as); } } switch (type) { case NAME_FD: mutex_enter(&fip->fi_lock); if (fd < fip->fi_nfiles) { UF_ENTER(ufp, fip, fd); if (ufp->uf_file != NULL) { vp = ufp->uf_file->f_vnode; VN_HOLD(vp); } UF_EXIT(ufp); } mutex_exit(&fip->fi_lock); idx = fd + 4; break; case NAME_ROOT: idx = 2; break; case NAME_CWD: idx = 3; break; case NAME_OBJECT: case NAME_UNKNOWN: /* Nothing to do */ break; } mutex_enter(&p->p_lock); prunlock(dpnp); if (vp != NULL) { pnp = prgetnode(dp, PR_PATH); pnp->pr_flags |= flags; pnp->pr_common = dpnp->pr_common; pnp->pr_pcommon = dpnp->pr_pcommon; pnp->pr_realvp = vp; pnp->pr_parent = dp; /* needed for prlookup */ pnp->pr_ino = pmkino(idx, dpnp->pr_common->prc_slot, PR_PATH); VN_HOLD(dp); vp = PTOV(pnp); vp->v_type = VLNK; } return (vp); } /* * Look up one of the process's active templates. */ static vnode_t * pr_lookup_tmpldir(vnode_t *dp, char *comp) { prnode_t *dpnp = VTOP(dp); prnode_t *pnp; vnode_t *vp = NULL; proc_t *p; int i; ASSERT(dpnp->pr_type == PR_TMPLDIR); for (i = 0; i < ct_ntypes; i++) if (strcmp(comp, ct_types[i]->ct_type_name) == 0) break; if (i == ct_ntypes) return (NULL); pnp = prgetnode(dp, PR_TMPL); if (prlock(dpnp, ZNO) != 0) { prfreenode(pnp); return (NULL); } p = dpnp->pr_common->prc_proc; if ((p->p_flag & SSYS) || p->p_as == &kas || (dpnp->pr_common->prc_flags & (PRC_DESTROY | PRC_LWP)) != PRC_LWP) { prunlock(dpnp); prfreenode(pnp); return (NULL); } if (ttolwp(dpnp->pr_common->prc_thread)->lwp_ct_active[i] != NULL) { pnp->pr_common = dpnp->pr_common; pnp->pr_pcommon = dpnp->pr_pcommon; pnp->pr_parent = dp; pnp->pr_cttype = i; VN_HOLD(dp); vp = PTOV(pnp); } else { prfreenode(pnp); } prunlock(dpnp); return (vp); } /* * Look up one of the contracts owned by the process. */ static vnode_t * pr_lookup_ctdir(vnode_t *dp, char *comp) { prnode_t *dpnp = VTOP(dp); prnode_t *pnp; vnode_t *vp = NULL; proc_t *p; id_t id = 0; contract_t *ct; int c; ASSERT(dpnp->pr_type == PR_CTDIR); while ((c = *comp++) != '\0') { id_t oid; if (c < '0' || c > '9') return (NULL); oid = id; id = 10 * id + c - '0'; if (id / 10 != oid) /* integer overflow */ return (NULL); } /* * Search all contracts; we'll filter below. */ ct = contract_ptr(id, GLOBAL_ZONEUNIQID); if (ct == NULL) return (NULL); pnp = prgetnode(dp, PR_CT); if (prlock(dpnp, ZNO) != 0) { prfreenode(pnp); contract_rele(ct); return (NULL); } p = dpnp->pr_common->prc_proc; /* * We only allow lookups of contracts owned by this process, or, * if we are zsched and this is a zone's procfs, contracts on * stuff in the zone which are held by processes or contracts * outside the zone. (see logic in contract_status_common) */ if ((ct->ct_owner != p) && !(p == VTOZONE(dp)->zone_zsched && ct->ct_state < CTS_ORPHAN && VTOZONE(dp)->zone_uniqid == contract_getzuniqid(ct) && VTOZONE(dp)->zone_uniqid != GLOBAL_ZONEUNIQID && ct->ct_czuniqid == GLOBAL_ZONEUNIQID)) { prunlock(dpnp); prfreenode(pnp); contract_rele(ct); return (NULL); } pnp->pr_common = dpnp->pr_common; pnp->pr_pcommon = dpnp->pr_pcommon; pnp->pr_contract = ct; pnp->pr_parent = dp; pnp->pr_ino = pmkino(id, pnp->pr_common->prc_slot, PR_CT); VN_HOLD(dp); prunlock(dpnp); vp = PTOV(pnp); return (vp); } /* * Construct an lwp vnode for the old /proc interface. * We stand on our head to make the /proc plumbing correct. */ vnode_t * prlwpnode(prnode_t *pnp, uint_t tid) { char comp[12]; vnode_t *dp; vnode_t *vp; prcommon_t *pcp; proc_t *p; /* * Lookup the /proc//lwp/ directory vnode. */ if (pnp->pr_type == PR_PIDFILE) { dp = pnp->pr_parent; /* /proc/ */ VN_HOLD(dp); vp = pr_lookup_piddir(dp, "lwp"); VN_RELE(dp); if ((dp = vp) == NULL) /* /proc//lwp */ return (NULL); } else if (pnp->pr_type == PR_LWPIDFILE) { dp = pnp->pr_parent; /* /proc//lwp/ */ dp = VTOP(dp)->pr_parent; /* /proc//lwp */ VN_HOLD(dp); } else { return (NULL); } (void) pr_u32tos(tid, comp, sizeof (comp)); vp = pr_lookup_lwpdir(dp, comp); VN_RELE(dp); if ((dp = vp) == NULL) return (NULL); pnp = prgetnode(dp, PR_LWPIDFILE); vp = PTOV(pnp); /* * prgetnode() initialized most of the prnode. * Finish the job. */ pcp = VTOP(dp)->pr_common; pnp->pr_ino = ptoi(pcp->prc_pid); pnp->pr_common = pcp; pnp->pr_pcommon = VTOP(dp)->pr_pcommon; pnp->pr_parent = dp; /* * Link new vnode into list of all /proc vnodes for the process. */ p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) { VN_RELE(dp); prfreenode(pnp); vp = NULL; } else if (pcp->prc_thread == NULL) { prunlock(pnp); VN_RELE(dp); prfreenode(pnp); vp = NULL; } else { pnp->pr_next = p->p_plist; p->p_plist = vp; prunlock(pnp); } return (vp); } #if defined(DEBUG) static uint32_t nprnode; static uint32_t nprcommon; #define INCREMENT(x) atomic_inc_32(&x); #define DECREMENT(x) atomic_dec_32(&x); #else #define INCREMENT(x) #define DECREMENT(x) #endif /* DEBUG */ /* * New /proc vnode required; allocate it and fill in most of the fields. */ prnode_t * prgetnode(vnode_t *dp, prnodetype_t type) { prnode_t *pnp; prcommon_t *pcp; vnode_t *vp; ulong_t nfiles; INCREMENT(nprnode); pnp = kmem_zalloc(sizeof (prnode_t), KM_SLEEP); mutex_init(&pnp->pr_mutex, NULL, MUTEX_DEFAULT, NULL); pnp->pr_type = type; pnp->pr_vnode = vn_alloc(KM_SLEEP); vp = PTOV(pnp); vp->v_flag = VNOCACHE|VNOMAP|VNOSWAP|VNOMOUNT; vn_setops(vp, prvnodeops); vp->v_vfsp = dp->v_vfsp; vp->v_type = VPROC; vp->v_data = (caddr_t)pnp; switch (type) { case PR_PIDDIR: case PR_LWPIDDIR: /* * We need a prcommon and a files array for each of these. */ INCREMENT(nprcommon); pcp = kmem_zalloc(sizeof (prcommon_t), KM_SLEEP); pcp->prc_refcnt = 1; pnp->pr_common = pcp; mutex_init(&pcp->prc_mutex, NULL, MUTEX_DEFAULT, NULL); cv_init(&pcp->prc_wait, NULL, CV_DEFAULT, NULL); nfiles = (type == PR_PIDDIR)? NPIDDIRFILES : NLWPIDDIRFILES; pnp->pr_files = kmem_zalloc(nfiles * sizeof (vnode_t *), KM_SLEEP); vp->v_type = VDIR; /* * Mode should be read-search by all, but we cannot so long * as we must support compatibility mode with old /proc. * Make /proc/ be read by owner only, search by all. * Make /proc//lwp/ read-search by all. Also, * set VDIROPEN on /proc/ so it can be opened for writing. */ if (type == PR_PIDDIR) { /* kludge for old /proc interface */ prnode_t *xpnp = prgetnode(dp, PR_PIDFILE); pnp->pr_pidfile = PTOV(xpnp); pnp->pr_mode = 0511; vp->v_flag |= VDIROPEN; } else { pnp->pr_mode = 0555; } break; case PR_CURDIR: case PR_ROOTDIR: case PR_FDDIR: case PR_FDINFODIR: case PR_OBJECTDIR: case PR_PATHDIR: case PR_CTDIR: case PR_TMPLDIR: vp->v_type = VDIR; pnp->pr_mode = 0500; /* read-search by owner only */ break; case PR_CT: vp->v_type = VLNK; pnp->pr_mode = 0500; /* read-search by owner only */ break; case PR_PATH: case PR_SELF: vp->v_type = VLNK; pnp->pr_mode = 0777; break; case PR_LWPDIR: vp->v_type = VDIR; pnp->pr_mode = 0555; /* read-search by all */ break; case PR_AS: case PR_TMPL: pnp->pr_mode = 0600; /* read-write by owner only */ break; case PR_CTL: case PR_LWPCTL: pnp->pr_mode = 0200; /* write-only by owner only */ break; case PR_PIDFILE: case PR_LWPIDFILE: pnp->pr_mode = 0600; /* read-write by owner only */ break; case PR_LWPNAME: pnp->pr_mode = 0644; /* readable by all + owner can write */ break; case PR_PSINFO: case PR_LPSINFO: case PR_LWPSINFO: case PR_USAGE: case PR_LUSAGE: case PR_LWPUSAGE: pnp->pr_mode = 0444; /* read-only by all */ break; default: pnp->pr_mode = 0400; /* read-only by owner only */ break; } vn_exists(vp); return (pnp); } /* * Free the storage obtained from prgetnode(). */ void prfreenode(prnode_t *pnp) { vnode_t *vp; ulong_t nfiles; vn_invalid(PTOV(pnp)); vn_free(PTOV(pnp)); mutex_destroy(&pnp->pr_mutex); switch (pnp->pr_type) { case PR_PIDDIR: /* kludge for old /proc interface */ if (pnp->pr_pidfile != NULL) { prfreenode(VTOP(pnp->pr_pidfile)); pnp->pr_pidfile = NULL; } /* FALLTHROUGH */ case PR_LWPIDDIR: /* * We allocated a prcommon and a files array for each of these. */ prfreecommon(pnp->pr_common); nfiles = (pnp->pr_type == PR_PIDDIR)? NPIDDIRFILES : NLWPIDDIRFILES; kmem_free(pnp->pr_files, nfiles * sizeof (vnode_t *)); break; default: break; } /* * If there is an underlying vnode, be sure * to release it after freeing the prnode. */ vp = pnp->pr_realvp; kmem_free(pnp, sizeof (*pnp)); DECREMENT(nprnode); if (vp != NULL) { VN_RELE(vp); } } /* * Free a prcommon structure, if the reference count reaches zero. */ static void prfreecommon(prcommon_t *pcp) { mutex_enter(&pcp->prc_mutex); ASSERT(pcp->prc_refcnt > 0); if (--pcp->prc_refcnt != 0) mutex_exit(&pcp->prc_mutex); else { mutex_exit(&pcp->prc_mutex); ASSERT(pcp->prc_pollhead.ph_list == NULL); ASSERT(pcp->prc_refcnt == 0); ASSERT(pcp->prc_selfopens == 0 && pcp->prc_writers == 0); mutex_destroy(&pcp->prc_mutex); cv_destroy(&pcp->prc_wait); kmem_free(pcp, sizeof (prcommon_t)); DECREMENT(nprcommon); } } /* * Array of readdir functions, indexed by /proc file type. */ static int pr_readdir_notdir(), pr_readdir_procdir(), pr_readdir_piddir(), pr_readdir_objectdir(), pr_readdir_lwpdir(), pr_readdir_lwpiddir(), pr_readdir_fddir(), pr_readdir_fdinfodir(), pr_readdir_pathdir(), pr_readdir_tmpldir(), pr_readdir_ctdir(); static int (*pr_readdir_function[PR_NFILES])() = { pr_readdir_procdir, /* /proc */ pr_readdir_notdir, /* /proc/self */ pr_readdir_piddir, /* /proc/ */ pr_readdir_notdir, /* /proc//as */ pr_readdir_notdir, /* /proc//ctl */ pr_readdir_notdir, /* /proc//status */ pr_readdir_notdir, /* /proc//lstatus */ pr_readdir_notdir, /* /proc//psinfo */ pr_readdir_notdir, /* /proc//lpsinfo */ pr_readdir_notdir, /* /proc//map */ pr_readdir_notdir, /* /proc//rmap */ pr_readdir_notdir, /* /proc//xmap */ pr_readdir_notdir, /* /proc//cred */ pr_readdir_notdir, /* /proc//sigact */ pr_readdir_notdir, /* /proc//auxv */ #if defined(__x86) pr_readdir_notdir, /* /proc//ldt */ #endif pr_readdir_notdir, /* /proc//usage */ pr_readdir_notdir, /* /proc//lusage */ pr_readdir_notdir, /* /proc//pagedata */ pr_readdir_notdir, /* /proc//watch */ pr_readdir_notdir, /* /proc//cwd */ pr_readdir_notdir, /* /proc//root */ pr_readdir_fddir, /* /proc//fd */ pr_readdir_notdir, /* /proc//fd/nn */ pr_readdir_fdinfodir, /* /proc//fdinfo */ pr_readdir_notdir, /* /proc//fdinfo/nn */ pr_readdir_objectdir, /* /proc//object */ pr_readdir_notdir, /* /proc//object/xxx */ pr_readdir_lwpdir, /* /proc//lwp */ pr_readdir_lwpiddir, /* /proc//lwp/ */ pr_readdir_notdir, /* /proc//lwp//lwpctl */ pr_readdir_notdir, /* /proc//lwp//lwpname */ pr_readdir_notdir, /* /proc//lwp//lwpstatus */ pr_readdir_notdir, /* /proc//lwp//lwpsinfo */ pr_readdir_notdir, /* /proc//lwp//lwpusage */ pr_readdir_notdir, /* /proc//lwp//xregs */ pr_readdir_tmpldir, /* /proc//lwp//templates */ pr_readdir_notdir, /* /proc//lwp//templates/ */ pr_readdir_notdir, /* /proc//lwp//spymaster */ #if defined(__sparc) pr_readdir_notdir, /* /proc//lwp//gwindows */ pr_readdir_notdir, /* /proc//lwp//asrs */ #endif pr_readdir_notdir, /* /proc//priv */ pr_readdir_pathdir, /* /proc//path */ pr_readdir_notdir, /* /proc//path/xxx */ pr_readdir_ctdir, /* /proc//contracts */ pr_readdir_notdir, /* /proc//contracts/ */ pr_readdir_notdir, /* /proc//secflags */ pr_readdir_notdir, /* old process file */ pr_readdir_notdir, /* old lwp file */ pr_readdir_notdir, /* old pagedata file */ }; /* ARGSUSED */ static int prreaddir(vnode_t *vp, uio_t *uiop, cred_t *cr, int *eofp, caller_context_t *ct, int flags) { prnode_t *pnp = VTOP(vp); ASSERT(pnp->pr_type < PR_NFILES); /* XXX - Do we need to pass ct and flags? */ return (pr_readdir_function[pnp->pr_type](pnp, uiop, eofp)); } /* ARGSUSED */ static int pr_readdir_notdir(prnode_t *pnp, uio_t *uiop, int *eofp) { return (ENOTDIR); } /* ARGSUSED */ static int pr_readdir_procdir(prnode_t *pnp, uio_t *uiop, int *eofp) { zoneid_t zoneid; gfs_readdir_state_t gstate; int error, eof = 0; offset_t n; ASSERT(pnp->pr_type == PR_PROCDIR); zoneid = VTOZONE(PTOV(pnp))->zone_id; if ((error = gfs_readdir_init(&gstate, PNSIZ, PRSDSIZE, uiop, PRROOTINO, PRROOTINO, 0)) != 0) return (error); /* * Loop until user's request is satisfied or until all processes * have been examined. */ while ((error = gfs_readdir_pred(&gstate, uiop, &n)) == 0) { uint_t pid; int pslot; proc_t *p; /* * Find next entry. Skip processes not visible where * this /proc was mounted. */ mutex_enter(&pidlock); while (n < v.v_proc && ((p = pid_entry(n)) == NULL || p->p_stat == SIDL || (zoneid != GLOBAL_ZONEID && p->p_zone->zone_id != zoneid) || secpolicy_basic_procinfo(CRED(), p, curproc) != 0)) n++; /* * Stop when entire proc table has been examined. */ if (n >= v.v_proc) { mutex_exit(&pidlock); eof = 1; break; } ASSERT(p->p_stat != 0); pid = p->p_pid; pslot = p->p_slot; mutex_exit(&pidlock); error = gfs_readdir_emitn(&gstate, uiop, n, pmkino(0, pslot, PR_PIDDIR), pid); if (error) break; } return (gfs_readdir_fini(&gstate, error, eofp, eof)); } /* ARGSUSED */ static int pr_readdir_piddir(prnode_t *pnp, uio_t *uiop, int *eofp) { int zombie = ((pnp->pr_pcommon->prc_flags & PRC_DESTROY) != 0); prdirent_t dirent; prdirent_t *dirp; offset_t off; int error; ASSERT(pnp->pr_type == PR_PIDDIR); if (uiop->uio_offset < 0 || uiop->uio_offset % sizeof (prdirent_t) != 0 || uiop->uio_resid < sizeof (prdirent_t)) return (EINVAL); if (pnp->pr_pcommon->prc_proc == NULL) return (ENOENT); if (uiop->uio_offset >= sizeof (piddir)) goto out; /* * Loop until user's request is satisfied, omitting some * files along the way if the process is a zombie. */ for (dirp = &piddir[uiop->uio_offset / sizeof (prdirent_t)]; uiop->uio_resid >= sizeof (prdirent_t) && dirp < &piddir[NPIDDIRFILES+2]; uiop->uio_offset = off + sizeof (prdirent_t), dirp++) { off = uiop->uio_offset; if (zombie) { switch (dirp->d_ino) { case PR_PIDDIR: case PR_PROCDIR: case PR_PSINFO: case PR_USAGE: break; default: continue; } } bcopy(dirp, &dirent, sizeof (prdirent_t)); if (dirent.d_ino == PR_PROCDIR) dirent.d_ino = PRROOTINO; else dirent.d_ino = pmkino(0, pnp->pr_pcommon->prc_slot, dirent.d_ino); if ((error = uiomove((caddr_t)&dirent, sizeof (prdirent_t), UIO_READ, uiop)) != 0) return (error); } out: if (eofp) *eofp = (uiop->uio_offset >= sizeof (piddir)); return (0); } static void rebuild_objdir(struct as *as) { struct seg *seg; vnode_t *vp; vattr_t vattr; vnode_t **dir; ulong_t nalloc; ulong_t nentries; int i, j; ulong_t nold, nnew; ASSERT(AS_WRITE_HELD(as)); if (as->a_updatedir == 0 && as->a_objectdir != NULL) return; as->a_updatedir = 0; if ((nalloc = avl_numnodes(&as->a_segtree)) == 0 || (seg = AS_SEGFIRST(as)) == NULL) /* can't happen? */ return; /* * Allocate space for the new object directory. * (This is usually about two times too many entries.) */ nalloc = (nalloc + 0xf) & ~0xf; /* multiple of 16 */ dir = kmem_zalloc(nalloc * sizeof (vnode_t *), KM_SLEEP); /* fill in the new directory with desired entries */ nentries = 0; do { vattr.va_mask = AT_FSID|AT_NODEID; if (seg->s_ops == &segvn_ops && SEGOP_GETVP(seg, seg->s_base, &vp) == 0 && vp != NULL && vp->v_type == VREG && VOP_GETATTR(vp, &vattr, 0, CRED(), NULL) == 0) { for (i = 0; i < nentries; i++) if (vp == dir[i]) break; if (i == nentries) { ASSERT(nentries < nalloc); dir[nentries++] = vp; } } } while ((seg = AS_SEGNEXT(as, seg)) != NULL); if (as->a_objectdir == NULL) { /* first time */ as->a_objectdir = dir; as->a_sizedir = nalloc; return; } /* * Null out all of the defunct entries in the old directory. */ nold = 0; nnew = nentries; for (i = 0; i < as->a_sizedir; i++) { if ((vp = as->a_objectdir[i]) != NULL) { for (j = 0; j < nentries; j++) { if (vp == dir[j]) { dir[j] = NULL; nnew--; break; } } if (j == nentries) as->a_objectdir[i] = NULL; else nold++; } } if (nold + nnew > as->a_sizedir) { /* * Reallocate the old directory to have enough * space for the old and new entries combined. * Round up to the next multiple of 16. */ ulong_t newsize = (nold + nnew + 0xf) & ~0xf; vnode_t **newdir = kmem_zalloc(newsize * sizeof (vnode_t *), KM_SLEEP); bcopy(as->a_objectdir, newdir, as->a_sizedir * sizeof (vnode_t *)); kmem_free(as->a_objectdir, as->a_sizedir * sizeof (vnode_t *)); as->a_objectdir = newdir; as->a_sizedir = newsize; } /* * Move all new entries to the old directory and * deallocate the space used by the new directory. */ if (nnew) { for (i = 0, j = 0; i < nentries; i++) { if ((vp = dir[i]) == NULL) continue; for (; j < as->a_sizedir; j++) { if (as->a_objectdir[j] != NULL) continue; as->a_objectdir[j++] = vp; break; } } } kmem_free(dir, nalloc * sizeof (vnode_t *)); } /* * Return the vnode from a slot in the process's object directory. * The caller must have locked the process's address space. * The only caller is below, in pr_readdir_objectdir(). */ static vnode_t * obj_entry(struct as *as, int slot) { ASSERT(AS_LOCK_HELD(as)); if (as->a_objectdir == NULL) return (NULL); ASSERT(slot < as->a_sizedir); return (as->a_objectdir[slot]); } /* ARGSUSED */ static int pr_readdir_objectdir(prnode_t *pnp, uio_t *uiop, int *eofp) { gfs_readdir_state_t gstate; int error, eof = 0; offset_t n; int pslot; size_t objdirsize; proc_t *p; struct as *as; vnode_t *vp; ASSERT(pnp->pr_type == PR_OBJECTDIR); if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; pslot = p->p_slot; /* * We drop p_lock before grabbing the address space lock * in order to avoid a deadlock with the clock thread. * The process will not disappear and its address space * will not change because it is marked P_PR_LOCK. */ mutex_exit(&p->p_lock); if ((error = gfs_readdir_init(&gstate, 64, PRSDSIZE, uiop, pmkino(0, pslot, PR_PIDDIR), pmkino(0, pslot, PR_OBJECTDIR), 0)) != 0) { mutex_enter(&p->p_lock); prunlock(pnp); return (error); } if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) { as = NULL; objdirsize = 0; } /* * Loop until user's request is satisfied or until * all mapped objects have been examined. Cannot hold * the address space lock for the following call as * gfs_readdir_pred() utimately causes a call to uiomove(). */ while ((error = gfs_readdir_pred(&gstate, uiop, &n)) == 0) { vattr_t vattr; char str[64]; /* * Set the correct size of the directory just * in case the process has changed it's address * space via mmap/munmap calls. */ if (as != NULL) { AS_LOCK_ENTER(as, RW_WRITER); if (as->a_updatedir) rebuild_objdir(as); objdirsize = as->a_sizedir; } /* * Find next object. */ vattr.va_mask = AT_FSID | AT_NODEID; while (n < objdirsize && (((vp = obj_entry(as, n)) == NULL) || (VOP_GETATTR(vp, &vattr, 0, CRED(), NULL) != 0))) { vattr.va_mask = AT_FSID | AT_NODEID; n++; } if (as != NULL) AS_LOCK_EXIT(as); /* * Stop when all objects have been reported. */ if (n >= objdirsize) { eof = 1; break; } if (vp == p->p_exec) (void) strcpy(str, "a.out"); else pr_object_name(str, vp, &vattr); error = gfs_readdir_emit(&gstate, uiop, n, vattr.va_nodeid, str, 0); if (error) break; } mutex_enter(&p->p_lock); prunlock(pnp); return (gfs_readdir_fini(&gstate, error, eofp, eof)); } /* ARGSUSED */ static int pr_readdir_lwpdir(prnode_t *pnp, uio_t *uiop, int *eofp) { gfs_readdir_state_t gstate; int error, eof = 0; offset_t tslot; proc_t *p; int pslot; lwpdir_t *lwpdir; int lwpdirsize; ASSERT(pnp->pr_type == PR_LWPDIR); p = pr_p_lock(pnp); mutex_exit(&pr_pidlock); if (p == NULL) return (ENOENT); ASSERT(p == pnp->pr_common->prc_proc); pslot = p->p_slot; lwpdir = p->p_lwpdir; lwpdirsize = p->p_lwpdir_sz; /* * Drop p->p_lock so we can safely do uiomove(). * The lwp directory will not change because * we have the process locked with P_PR_LOCK. */ mutex_exit(&p->p_lock); if ((error = gfs_readdir_init(&gstate, PLNSIZ, PRSDSIZE, uiop, pmkino(0, pslot, PR_PIDDIR), pmkino(0, pslot, PR_LWPDIR), 0)) != 0) { mutex_enter(&p->p_lock); prunlock(pnp); return (error); } /* * Loop until user's request is satisfied or until all lwps * have been examined. */ while ((error = gfs_readdir_pred(&gstate, uiop, &tslot)) == 0) { lwpent_t *lep; uint_t tid; /* * Find next LWP. */ while (tslot < lwpdirsize && ((lep = lwpdir[tslot].ld_entry) == NULL)) tslot++; /* * Stop when all lwps have been reported. */ if (tslot >= lwpdirsize) { eof = 1; break; } tid = lep->le_lwpid; error = gfs_readdir_emitn(&gstate, uiop, tslot, pmkino(tslot, pslot, PR_LWPIDDIR), tid); if (error) break; } mutex_enter(&p->p_lock); prunlock(pnp); return (gfs_readdir_fini(&gstate, error, eofp, eof)); } /* ARGSUSED */ static int pr_readdir_lwpiddir(prnode_t *pnp, uio_t *uiop, int *eofp) { prcommon_t *pcp = pnp->pr_common; int zombie = ((pcp->prc_flags & PRC_DESTROY) != 0); prdirent_t dirent; prdirent_t *dirp; offset_t off; int error; int pslot; int tslot; ASSERT(pnp->pr_type == PR_LWPIDDIR); if (uiop->uio_offset < 0 || uiop->uio_offset % sizeof (prdirent_t) != 0 || uiop->uio_resid < sizeof (prdirent_t)) return (EINVAL); if (pcp->prc_proc == NULL || pcp->prc_tslot == -1) return (ENOENT); if (uiop->uio_offset >= sizeof (lwpiddir)) goto out; /* * Loop until user's request is satisfied, omitting some files * along the way if the lwp is a zombie and also depending * on the data model of the process. */ pslot = pcp->prc_slot; tslot = pcp->prc_tslot; for (dirp = &lwpiddir[uiop->uio_offset / sizeof (prdirent_t)]; uiop->uio_resid >= sizeof (prdirent_t) && dirp < &lwpiddir[NLWPIDDIRFILES+2]; uiop->uio_offset = off + sizeof (prdirent_t), dirp++) { off = uiop->uio_offset; if (zombie) { switch (dirp->d_ino) { case PR_LWPIDDIR: case PR_LWPDIR: case PR_LWPSINFO: break; default: continue; } } #if defined(__sparc) /* the asrs file exists only for sparc v9 _LP64 processes */ if (dirp->d_ino == PR_ASRS && pcp->prc_datamodel != DATAMODEL_LP64) continue; #endif bcopy(dirp, &dirent, sizeof (prdirent_t)); if (dirent.d_ino == PR_LWPDIR) dirent.d_ino = pmkino(0, pslot, dirp->d_ino); else dirent.d_ino = pmkino(tslot, pslot, dirp->d_ino); if ((error = uiomove((caddr_t)&dirent, sizeof (prdirent_t), UIO_READ, uiop)) != 0) return (error); } out: if (eofp) *eofp = (uiop->uio_offset >= sizeof (lwpiddir)); return (0); } /* * Helper function for reading a directory which lists open file desciptors */ static int pr_readdir_fdlist(prnode_t *pnp, uio_t *uiop, int *eofp, prnodetype_t dirtype, prnodetype_t entrytype) { gfs_readdir_state_t gstate; int error, eof = 0; offset_t n; proc_t *p; int pslot; int fddirsize; uf_info_t *fip; if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; pslot = p->p_slot; fip = P_FINFO(p); mutex_exit(&p->p_lock); if ((error = gfs_readdir_init(&gstate, PLNSIZ, PRSDSIZE, uiop, pmkino(0, pslot, PR_PIDDIR), pmkino(0, pslot, dirtype), 0)) != 0) { mutex_enter(&p->p_lock); prunlock(pnp); return (error); } mutex_enter(&fip->fi_lock); if ((p->p_flag & SSYS) || p->p_as == &kas) fddirsize = 0; else fddirsize = fip->fi_nfiles; /* * Loop until user's request is satisfied or until * all file descriptors have been examined. */ while ((error = gfs_readdir_pred(&gstate, uiop, &n)) == 0) { /* * Find next fd. */ while (n < fddirsize && fip->fi_list[n].uf_file == NULL) n++; /* * Stop when all fds have been reported. */ if (n >= fddirsize) { eof = 1; break; } error = gfs_readdir_emitn(&gstate, uiop, n, pmkino(n, pslot, entrytype), n); if (error) break; } mutex_exit(&fip->fi_lock); mutex_enter(&p->p_lock); prunlock(pnp); return (gfs_readdir_fini(&gstate, error, eofp, eof)); } static int pr_readdir_fddir(prnode_t *pnp, uio_t *uiop, int *eofp) { ASSERT(pnp->pr_type == PR_FDDIR); return (pr_readdir_fdlist(pnp, uiop, eofp, pnp->pr_type, PR_FD)); } static int pr_readdir_fdinfodir(prnode_t *pnp, uio_t *uiop, int *eofp) { ASSERT(pnp->pr_type == PR_FDINFODIR); return (pr_readdir_fdlist(pnp, uiop, eofp, pnp->pr_type, PR_FDINFO)); } /* ARGSUSED */ static int pr_readdir_pathdir(prnode_t *pnp, uio_t *uiop, int *eofp) { longlong_t bp[DIRENT64_RECLEN(64) / sizeof (longlong_t)]; dirent64_t *dirent = (dirent64_t *)bp; int reclen; ssize_t oresid; offset_t off, idx; int error = 0; proc_t *p; int fd, obj; int pslot; int fddirsize; uf_info_t *fip; struct as *as = NULL; size_t objdirsize; vattr_t vattr; vnode_t *vp; ASSERT(pnp->pr_type == PR_PATHDIR); if (uiop->uio_offset < 0 || uiop->uio_resid <= 0 || (uiop->uio_offset % PRSDSIZE) != 0) return (EINVAL); oresid = uiop->uio_resid; bzero(bp, sizeof (bp)); if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; fip = P_FINFO(p); pslot = p->p_slot; mutex_exit(&p->p_lock); if ((p->p_flag & SSYS) || (as = p->p_as) == &kas) { as = NULL; objdirsize = 0; } else { AS_LOCK_ENTER(as, RW_WRITER); if (as->a_updatedir) rebuild_objdir(as); objdirsize = as->a_sizedir; AS_LOCK_EXIT(as); as = NULL; } mutex_enter(&fip->fi_lock); if ((p->p_flag & SSYS) || p->p_as == &kas) fddirsize = 0; else fddirsize = fip->fi_nfiles; for (; uiop->uio_resid > 0; uiop->uio_offset = off + PRSDSIZE) { /* * There are 4 special files in the path directory: ".", "..", * "root", and "cwd". We handle those specially here. */ off = uiop->uio_offset; idx = off / PRSDSIZE; if (off == 0) { /* "." */ dirent->d_ino = pmkino(0, pslot, PR_PATHDIR); dirent->d_name[0] = '.'; dirent->d_name[1] = '\0'; reclen = DIRENT64_RECLEN(1); } else if (idx == 1) { /* ".." */ dirent->d_ino = pmkino(0, pslot, PR_PIDDIR); dirent->d_name[0] = '.'; dirent->d_name[1] = '.'; dirent->d_name[2] = '\0'; reclen = DIRENT64_RECLEN(2); } else if (idx == 2) { /* "root" */ dirent->d_ino = pmkino(idx, pslot, PR_PATH); (void) strcpy(dirent->d_name, "root"); reclen = DIRENT64_RECLEN(4); } else if (idx == 3) { /* "cwd" */ dirent->d_ino = pmkino(idx, pslot, PR_PATH); (void) strcpy(dirent->d_name, "cwd"); reclen = DIRENT64_RECLEN(3); } else if (idx < 4 + fddirsize) { /* * In this case, we have one of the file descriptors. */ fd = idx - 4; if (fip->fi_list[fd].uf_file == NULL) continue; dirent->d_ino = pmkino(idx, pslot, PR_PATH); (void) pr_u32tos(fd, dirent->d_name, PLNSIZ+1); reclen = DIRENT64_RECLEN(PLNSIZ); } else if (idx < 4 + fddirsize + objdirsize) { if (fip != NULL) { mutex_exit(&fip->fi_lock); fip = NULL; } /* * We drop p_lock before grabbing the address space lock * in order to avoid a deadlock with the clock thread. * The process will not disappear and its address space * will not change because it is marked P_PR_LOCK. */ if (as == NULL) { as = p->p_as; AS_LOCK_ENTER(as, RW_WRITER); } if (as->a_updatedir) { rebuild_objdir(as); objdirsize = as->a_sizedir; } obj = idx - 4 - fddirsize; if ((vp = obj_entry(as, obj)) == NULL) continue; vattr.va_mask = AT_FSID|AT_NODEID; if (VOP_GETATTR(vp, &vattr, 0, CRED(), NULL) != 0) continue; if (vp == p->p_exec) (void) strcpy(dirent->d_name, "a.out"); else pr_object_name(dirent->d_name, vp, &vattr); dirent->d_ino = pmkino(idx, pslot, PR_PATH); reclen = DIRENT64_RECLEN(strlen(dirent->d_name)); } else { break; } dirent->d_off = uiop->uio_offset + PRSDSIZE; dirent->d_reclen = (ushort_t)reclen; if (reclen > uiop->uio_resid) { /* * Error if no entries have been returned yet. */ if (uiop->uio_resid == oresid) error = EINVAL; break; } /* * Drop the address space lock to do the uiomove(). */ if (as != NULL) AS_LOCK_EXIT(as); error = uiomove((caddr_t)dirent, reclen, UIO_READ, uiop); if (as != NULL) AS_LOCK_ENTER(as, RW_WRITER); if (error) break; } if (error == 0 && eofp) *eofp = (uiop->uio_offset >= (fddirsize + 2) * PRSDSIZE); if (fip != NULL) mutex_exit(&fip->fi_lock); if (as != NULL) AS_LOCK_EXIT(as); mutex_enter(&p->p_lock); prunlock(pnp); return (error); } static int pr_readdir_tmpldir(prnode_t *pnp, uio_t *uiop, int *eofp) { proc_t *p; int pslot, tslot; gfs_readdir_state_t gstate; int error, eof = 0; offset_t n; ASSERT(pnp->pr_type == PR_TMPLDIR); if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; pslot = pnp->pr_common->prc_slot; tslot = pnp->pr_common->prc_tslot; mutex_exit(&p->p_lock); if ((error = gfs_readdir_init(&gstate, PRDIRSIZE, PRSDSIZE, uiop, pmkino(tslot, pslot, PR_LWPDIR), pmkino(tslot, pslot, PR_TMPLDIR), 0)) != 0) { mutex_enter(&p->p_lock); prunlock(pnp); return (error); } while ((error = gfs_readdir_pred(&gstate, uiop, &n)) == 0) { /* * Check for an active template. Reading a directory's * contents is already racy, so we don't bother taking * any locks. */ while (n < ct_ntypes && pnp->pr_common->prc_thread->t_lwp->lwp_ct_active[n] == NULL) n++; /* * Stop when all types have been reported. */ if (n >= ct_ntypes) { eof = 1; break; } /* * The pmkino invocation below will need to be updated * when we create our fifth contract type. */ ASSERT(ct_ntypes <= 4); error = gfs_readdir_emit(&gstate, uiop, n, pmkino((tslot << 2) | n, pslot, PR_TMPL), ct_types[n]->ct_type_name, 0); if (error) break; } mutex_enter(&p->p_lock); prunlock(pnp); return (gfs_readdir_fini(&gstate, error, eofp, eof)); } static int pr_readdir_ctdir(prnode_t *pnp, uio_t *uiop, int *eofp) { proc_t *p; int pslot; gfs_readdir_state_t gstate; int error, eof = 0; offset_t n; uint64_t zid; ASSERT(pnp->pr_type == PR_CTDIR); if ((error = prlock(pnp, ZNO)) != 0) return (error); p = pnp->pr_common->prc_proc; pslot = p->p_slot; mutex_exit(&p->p_lock); if ((error = gfs_readdir_init(&gstate, PRDIRSIZE, PRSDSIZE, uiop, pmkino(0, pslot, PR_PIDDIR), pmkino(0, pslot, PR_CTDIR), 0)) != 0) { mutex_enter(&p->p_lock); prunlock(pnp); return (error); } zid = VTOZONE(pnp->pr_vnode)->zone_uniqid; while ((error = gfs_readdir_pred(&gstate, uiop, &n)) == 0) { id_t next = contract_plookup(p, n, zid); if (next == -1) { eof = 1; break; } error = gfs_readdir_emitn(&gstate, uiop, next, pmkino(next, pslot, PR_CT), next); if (error) break; } mutex_enter(&p->p_lock); prunlock(pnp); return (gfs_readdir_fini(&gstate, error, eofp, eof)); } /* ARGSUSED */ static int prfsync(vnode_t *vp, int syncflag, cred_t *cr, caller_context_t *ct) { return (0); } /* * Utility: remove a /proc vnode from a linked list, threaded through pr_next. */ static void pr_list_unlink(vnode_t *pvp, vnode_t **listp) { vnode_t *vp; prnode_t *pnp; while ((vp = *listp) != NULL) { pnp = VTOP(vp); if (vp == pvp) { *listp = pnp->pr_next; pnp->pr_next = NULL; break; } listp = &pnp->pr_next; } } /* ARGSUSED */ static void prinactive(vnode_t *vp, cred_t *cr, caller_context_t *ct) { prnode_t *pnp = VTOP(vp); prnodetype_t type = pnp->pr_type; proc_t *p; vnode_t *dp; vnode_t *ovp = NULL; prnode_t *opnp = NULL; switch (type) { case PR_OBJECT: case PR_FD: case PR_FDINFO: case PR_SELF: case PR_PATH: /* These are not linked into the usual lists */ ASSERT(vp->v_count == 1); if ((dp = pnp->pr_parent) != NULL) VN_RELE(dp); prfreenode(pnp); return; default: break; } mutex_enter(&pr_pidlock); if (pnp->pr_pcommon == NULL) p = NULL; else if ((p = pnp->pr_pcommon->prc_proc) != NULL) mutex_enter(&p->p_lock); mutex_enter(&vp->v_lock); if (type == PR_PROCDIR || vp->v_count > 1) { VN_RELE_LOCKED(vp); mutex_exit(&vp->v_lock); if (p != NULL) mutex_exit(&p->p_lock); mutex_exit(&pr_pidlock); return; } if ((dp = pnp->pr_parent) != NULL) { prnode_t *dpnp; switch (type) { case PR_PIDFILE: case PR_LWPIDFILE: case PR_OPAGEDATA: break; default: dpnp = VTOP(dp); mutex_enter(&dpnp->pr_mutex); if (dpnp->pr_files != NULL && dpnp->pr_files[pnp->pr_index] == vp) dpnp->pr_files[pnp->pr_index] = NULL; mutex_exit(&dpnp->pr_mutex); break; } pnp->pr_parent = NULL; } ASSERT(vp->v_count == 1); /* * If we allocated an old /proc/pid node, free it too. */ if (pnp->pr_pidfile != NULL) { ASSERT(type == PR_PIDDIR); ovp = pnp->pr_pidfile; opnp = VTOP(ovp); ASSERT(opnp->pr_type == PR_PIDFILE); pnp->pr_pidfile = NULL; } mutex_exit(&pr_pidlock); if (p != NULL) { /* * Remove the vnodes from the lists of * /proc vnodes for the process. */ int slot; switch (type) { case PR_PIDDIR: pr_list_unlink(vp, &p->p_trace); break; case PR_LWPIDDIR: if ((slot = pnp->pr_common->prc_tslot) != -1) { lwpent_t *lep = p->p_lwpdir[slot].ld_entry; pr_list_unlink(vp, &lep->le_trace); } break; default: pr_list_unlink(vp, &p->p_plist); break; } if (ovp != NULL) pr_list_unlink(ovp, &p->p_plist); mutex_exit(&p->p_lock); } mutex_exit(&vp->v_lock); if (type == PR_CT && pnp->pr_contract != NULL) { contract_rele(pnp->pr_contract); pnp->pr_contract = NULL; } if (opnp != NULL) prfreenode(opnp); prfreenode(pnp); if (dp != NULL) { VN_RELE(dp); } } /* ARGSUSED */ static int prseek(vnode_t *vp, offset_t ooff, offset_t *noffp, caller_context_t *ct) { return (0); } /* * We use the p_execdir member of proc_t to expand the %d token in core file * paths (the directory path for the executable that dumped core; see * coreadm(8) for details). We'd like gcore(1) to be able to expand %d in * the same way as core dumping from the kernel, but there's no convenient * and comprehensible way to export the path name for p_execdir. To solve * this, we try to find the actual path to the executable that was used. In * pr_lookup_pathdir(), we mark the a.out path name vnode with the PR_AOUT * flag, and use that here to indicate that more work is needed beyond the * call to vnodetopath(). */ static int prreadlink_lookup(prnode_t *pnp, char *buf, size_t size, cred_t *cr) { proc_t *p; vnode_t *vp, *execvp, *vrootp; int ret; size_t len; dirent64_t *dp; size_t dlen = DIRENT64_RECLEN(MAXPATHLEN); char *dbuf; p = curproc; mutex_enter(&p->p_lock); if ((vrootp = PTOU(p)->u_rdir) == NULL) vrootp = rootdir; VN_HOLD(vrootp); mutex_exit(&p->p_lock); ret = vnodetopath(vrootp, pnp->pr_realvp, buf, size, cr); /* * If PR_AOUT isn't set, then we looked up the path for the vnode; * otherwise, we looked up the path for (what we believe to be) the * containing directory. */ if ((pnp->pr_flags & PR_AOUT) == 0) { VN_RELE(vrootp); return (ret); } /* * Fail if there's a problem locking the process. This will only * occur if the process is changing so the information we would * report would already be invalid. */ if (prlock(pnp, ZNO) != 0) { VN_RELE(vrootp); return (EIO); } p = pnp->pr_common->prc_proc; mutex_exit(&p->p_lock); execvp = p->p_exec; VN_HOLD(execvp); /* * If our initial lookup of the directory failed, fall back to * the path name information for p_exec. */ if (ret != 0) { mutex_enter(&p->p_lock); prunlock(pnp); ret = vnodetopath(vrootp, execvp, buf, size, cr); VN_RELE(execvp); VN_RELE(vrootp); return (ret); } len = strlen(buf); /* * We use u_comm as a guess for the last component of the full * executable path name. If there isn't going to be enough space * we fall back to using the p_exec so that we can have _an_ * answer even if it's not perfect. */ if (strlen(PTOU(p)->u_comm) + len + 1 < size) { buf[len] = '/'; (void) strcpy(buf + len + 1, PTOU(p)->u_comm); mutex_enter(&p->p_lock); prunlock(pnp); /* * Do a forward lookup of our u_comm guess. */ if (lookupnameat(buf + len + 1, UIO_SYSSPACE, FOLLOW, NULLVPP, &vp, pnp->pr_realvp) == 0) { if (vn_compare(vp, execvp)) { VN_RELE(vp); VN_RELE(execvp); VN_RELE(vrootp); return (0); } VN_RELE(vp); } } else { mutex_enter(&p->p_lock); prunlock(pnp); } dbuf = kmem_alloc(dlen, KM_SLEEP); /* * Try to find a matching vnode by iterating through the directory's * entries. If that fails, fall back to the path information for * p_exec. */ if ((ret = dirfindvp(vrootp, pnp->pr_realvp, execvp, cr, dbuf, dlen, &dp)) == 0 && strlen(dp->d_name) + len + 1 < size) { buf[len] = '/'; (void) strcpy(buf + len + 1, dp->d_name); } else { ret = vnodetopath(vrootp, execvp, buf, size, cr); } kmem_free(dbuf, dlen); VN_RELE(execvp); VN_RELE(vrootp); return (ret); } /* ARGSUSED */ static int prreadlink(vnode_t *vp, uio_t *uiop, cred_t *cr, caller_context_t *ctp) { prnode_t *pnp = VTOP(vp); char *buf; int ret = EINVAL; char idbuf[16]; int length, rlength; contract_t *ct; switch (pnp->pr_type) { case PR_SELF: (void) snprintf(idbuf, sizeof (idbuf), "%d", curproc->p_pid); ret = uiomove(idbuf, strlen(idbuf), UIO_READ, uiop); break; case PR_OBJECT: case PR_FD: case PR_CURDIR: case PR_ROOTDIR: if (pnp->pr_realvp->v_type == VDIR) ret = 0; break; case PR_PATH: buf = kmem_alloc(MAXPATHLEN, KM_SLEEP); if ((ret = prreadlink_lookup(pnp, buf, MAXPATHLEN, cr)) == 0) ret = uiomove(buf, strlen(buf), UIO_READ, uiop); kmem_free(buf, MAXPATHLEN); break; case PR_CT: ASSERT(pnp->pr_contract != NULL); ct = pnp->pr_contract; length = sizeof (CTFS_ROOT "//") + sizeof (idbuf) + strlen(ct->ct_type->ct_type_name); buf = kmem_alloc(length, KM_SLEEP); rlength = snprintf(buf, length, CTFS_ROOT "/%s/%d", ct->ct_type->ct_type_name, ct->ct_id); ASSERT(rlength < length); ret = uiomove(buf, rlength, UIO_READ, uiop); kmem_free(buf, length); break; default: break; } return (ret); } /*ARGSUSED2*/ static int prcmp(vnode_t *vp1, vnode_t *vp2, caller_context_t *ct) { prnode_t *pp1, *pp2; if (vp1 == vp2) return (1); if (!vn_matchops(vp1, prvnodeops) || !vn_matchops(vp2, prvnodeops)) return (0); pp1 = VTOP(vp1); pp2 = VTOP(vp2); if (pp1->pr_type != pp2->pr_type) return (0); if (pp1->pr_type == PR_PROCDIR) return (1); if (pp1->pr_ino || pp2->pr_ino) return (pp2->pr_ino == pp1->pr_ino); if (pp1->pr_common == NULL || pp2->pr_common == NULL) return (0); return (pp1->pr_common->prc_slot == pp2->pr_common->prc_slot && pp1->pr_common->prc_tslot == pp2->pr_common->prc_tslot); } static int prrealvp(vnode_t *vp, vnode_t **vpp, caller_context_t *ct) { vnode_t *rvp; if ((rvp = VTOP(vp)->pr_realvp) != NULL) { vp = rvp; if (VOP_REALVP(vp, &rvp, ct) == 0) vp = rvp; } *vpp = vp; return (0); } /* * Return the answer requested to poll(). * POLLIN, POLLRDNORM, and POLLOUT are recognized as in fs_poll(). * In addition, these have special meaning for /proc files: * POLLPRI process or lwp stopped on an event of interest * POLLERR /proc file descriptor is invalid * POLLHUP process or lwp has terminated */ /*ARGSUSED5*/ static int prpoll(vnode_t *vp, short events, int anyyet, short *reventsp, pollhead_t **phpp, caller_context_t *ct) { prnode_t *pnp = VTOP(vp); prcommon_t *pcp = pnp->pr_common; pollhead_t *php = &pcp->prc_pollhead; proc_t *p; short revents; int error; int lockstate; ASSERT(pnp->pr_type < PR_NFILES); /* * Support for old /proc interface. */ if (pnp->pr_pidfile != NULL) { vp = pnp->pr_pidfile; pnp = VTOP(vp); ASSERT(pnp->pr_type == PR_PIDFILE); ASSERT(pnp->pr_common == pcp); } *reventsp = revents = 0; *phpp = (pollhead_t *)NULL; if (vp->v_type == VDIR) { *reventsp |= POLLNVAL; return (0); } /* avoid deadlock with prnotify() */ if (pollunlock(&lockstate) != 0) { *reventsp = POLLNVAL; return (0); } if ((error = prlock(pnp, ZNO)) != 0) { pollrelock(lockstate); switch (error) { case ENOENT: /* process or lwp died */ *reventsp = POLLHUP; error = 0; break; case EAGAIN: /* invalidated */ *reventsp = POLLERR; error = 0; break; } return (error); } /* * We have the process marked locked (P_PR_LOCK) and we are holding * its p->p_lock. We want to unmark the process but retain * exclusive control w.r.t. other /proc controlling processes * before reacquiring the polling locks. * * prunmark() does this for us. It unmarks the process * but retains p->p_lock so we still have exclusive control. * We will drop p->p_lock at the end to relinquish control. * * We cannot call prunlock() at the end to relinquish control * because prunlock(), like prunmark(), may drop and reacquire * p->p_lock and that would lead to a lock order violation * w.r.t. the polling locks we are about to reacquire. */ p = pcp->prc_proc; ASSERT(p != NULL); prunmark(p); pollrelock(lockstate); /* reacquire dropped poll locks */ if ((p->p_flag & SSYS) || p->p_as == &kas) revents = POLLNVAL; else { short ev; if ((ev = (events & (POLLIN|POLLRDNORM))) != 0) revents |= ev; /* * POLLWRNORM (same as POLLOUT) really should not be * used to indicate that the process or lwp stopped. * However, USL chose to use POLLWRNORM rather than * POLLPRI to indicate this, so we just accept either * requested event to indicate stopped. (grr...) */ if ((ev = (events & (POLLPRI|POLLOUT|POLLWRNORM))) != 0) { kthread_t *t; if (pcp->prc_flags & PRC_LWP) { t = pcp->prc_thread; ASSERT(t != NULL); thread_lock(t); } else { t = prchoose(p); /* returns locked t */ ASSERT(t != NULL); } if (ISTOPPED(t) || VSTOPPED(t)) revents |= ev; thread_unlock(t); } } *reventsp = revents; if ((!anyyet && revents == 0) || (events & POLLET)) { /* * Arrange to wake up the polling lwp when * the target process/lwp stops or terminates * or when the file descriptor becomes invalid. */ pcp->prc_flags |= PRC_POLL; *phpp = php; } mutex_exit(&p->p_lock); return (0); } /* in prioctl.c */ extern int prioctl(vnode_t *, int, intptr_t, int, cred_t *, int *, caller_context_t *); /* * /proc vnode operations vector */ const fs_operation_def_t pr_vnodeops_template[] = { VOPNAME_OPEN, { .vop_open = propen }, VOPNAME_CLOSE, { .vop_close = prclose }, VOPNAME_READ, { .vop_read = prread }, VOPNAME_WRITE, { .vop_write = prwrite }, VOPNAME_IOCTL, { .vop_ioctl = prioctl }, VOPNAME_GETATTR, { .vop_getattr = prgetattr }, VOPNAME_ACCESS, { .vop_access = praccess }, VOPNAME_LOOKUP, { .vop_lookup = prlookup }, VOPNAME_CREATE, { .vop_create = prcreate }, VOPNAME_READDIR, { .vop_readdir = prreaddir }, VOPNAME_READLINK, { .vop_readlink = prreadlink }, VOPNAME_FSYNC, { .vop_fsync = prfsync }, VOPNAME_INACTIVE, { .vop_inactive = prinactive }, VOPNAME_SEEK, { .vop_seek = prseek }, VOPNAME_CMP, { .vop_cmp = prcmp }, VOPNAME_FRLOCK, { .error = fs_error }, VOPNAME_REALVP, { .vop_realvp = prrealvp }, VOPNAME_POLL, { .vop_poll = prpoll }, VOPNAME_DISPOSE, { .error = fs_error }, VOPNAME_SHRLOCK, { .error = fs_error }, NULL, NULL };