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- #define THREE_LEVEL
- /*
- * linux/fs/proc/array.c
- *
- * Copyright (C) 1992 by Linus Torvalds
- * based on ideas by Darren Senn
- *
- * Fixes:
- * Michael. K. Johnson: stat,statm extensions.
- * <johnsonm@stolaf.edu>
- *
- * Pauline Middelink : Made cmdline,envline only break at '\0's, to
- * make sure SET_PROCTITLE works. Also removed
- * bad '!' which forced address recalculation for
- * EVERY character on the current page.
- * <middelin@polyware.iaf.nl>
- *
- * Danny ter Haar : Some minor additions for cpuinfo
- * <danny@ow.nl>
- *
- * Alessandro Rubini : profile extension.
- * <rubini@ipvvis.unipv.it>
- *
- * Jeff Tranter : added BogoMips field to cpuinfo
- * <Jeff_Tranter@Mitel.COM>
- *
- * Bruno Haible : remove 4K limit for the maps file
- * <haible@ma2s2.mathematik.uni-karlsruhe.de>
- */
-
- #include <linux/types.h>
- #include <linux/errno.h>
- #include <linux/sched.h>
- #include <linux/kernel.h>
- #include <linux/kernel_stat.h>
- #include <linux/tty.h>
- #include <linux/user.h>
- #include <linux/a.out.h>
- #include <linux/string.h>
- #include <linux/mman.h>
- #include <linux/proc_fs.h>
- #include <linux/ioport.h>
- #include <linux/config.h>
- #include <linux/delay.h>
- #include <linux/mm.h>
-
- #include <asm/segment.h>
- #include <asm/pgtable.h>
- #include <asm/io.h>
-
- #define LOAD_INT(x) ((x) >> FSHIFT)
- #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
-
- #ifdef CONFIG_DEBUG_MALLOC
- int get_malloc(char * buffer);
- #endif
-
-
- static int read_core(struct inode * inode, struct file * file,char * buf, int count)
- {
- unsigned long p = file->f_pos;
- int read;
- int count1;
- char * pnt;
- struct user dump;
-
- memset(&dump, 0, sizeof(struct user));
- dump.magic = CMAGIC;
- dump.u_dsize = high_memory >> 12;
-
- if (count < 0)
- return -EINVAL;
- if (p >= high_memory + PAGE_SIZE)
- return 0;
- if (count > high_memory + PAGE_SIZE - p)
- count = high_memory + PAGE_SIZE - p;
- read = 0;
-
- if (p < sizeof(struct user) && count > 0) {
- count1 = count;
- if (p + count1 > sizeof(struct user))
- count1 = sizeof(struct user)-p;
- pnt = (char *) &dump + p;
- memcpy_tofs(buf,(void *) pnt, count1);
- buf += count1;
- p += count1;
- count -= count1;
- read += count1;
- }
-
- while (p < 2*PAGE_SIZE && count > 0) {
- put_fs_byte(0,buf);
- buf++;
- p++;
- count--;
- read++;
- }
- memcpy_tofs(buf,(void *) (p - PAGE_SIZE),count);
- read += count;
- file->f_pos += read;
- return read;
- }
-
- static struct file_operations proc_kcore_operations = {
- NULL, /* lseek */
- read_core,
- };
-
- struct inode_operations proc_kcore_inode_operations = {
- &proc_kcore_operations,
- };
-
-
- #ifdef CONFIG_PROFILE
-
- extern unsigned long prof_len;
- extern unsigned long * prof_buffer;
- /*
- * This function accesses profiling information. The returned data is
- * binary: the sampling step and the actual contents of the profile
- * buffer. Use of the program readprofile is recommended in order to
- * get meaningful info out of these data.
- */
- static int read_profile(struct inode *inode, struct file *file, char *buf, int count)
- {
- unsigned long p = file->f_pos;
- int read;
- char * pnt;
- unsigned long sample_step = 1 << CONFIG_PROFILE_SHIFT;
-
- if (count < 0)
- return -EINVAL;
- if (p >= (prof_len+1)*sizeof(unsigned long))
- return 0;
- if (count > (prof_len+1)*sizeof(unsigned long) - p)
- count = (prof_len+1)*sizeof(unsigned long) - p;
- read = 0;
-
- while (p < sizeof(unsigned long) && count > 0) {
- put_fs_byte(*((char *)(&sample_step)+p),buf);
- buf++; p++; count--; read++;
- }
- pnt = (char *)prof_buffer + p - sizeof(unsigned long);
- memcpy_tofs(buf,(void *)pnt,count);
- read += count;
- file->f_pos += read;
- return read;
- }
-
- /* Writing to /proc/profile resets the counters */
- static int write_profile(struct inode * inode, struct file * file, char * buf, int count)
- {
- int i=prof_len;
-
- while (i--)
- prof_buffer[i]=0UL;
- return count;
- }
-
- static struct file_operations proc_profile_operations = {
- NULL, /* lseek */
- read_profile,
- write_profile,
- };
-
- struct inode_operations proc_profile_inode_operations = {
- &proc_profile_operations,
- };
-
- #endif /* CONFIG_PROFILE */
-
-
- static int get_loadavg(char * buffer)
- {
- int a, b, c;
-
- a = avenrun[0] + (FIXED_1/200);
- b = avenrun[1] + (FIXED_1/200);
- c = avenrun[2] + (FIXED_1/200);
- return sprintf(buffer,"%d.%02d %d.%02d %d.%02d\n",
- LOAD_INT(a), LOAD_FRAC(a),
- LOAD_INT(b), LOAD_FRAC(b),
- LOAD_INT(c), LOAD_FRAC(c));
- }
-
- static int get_kstat(char * buffer)
- {
- int i, len;
- unsigned sum = 0;
-
- for (i = 0 ; i < 16 ; i++)
- sum += kstat.interrupts[i];
- len = sprintf(buffer,
- "cpu %u %u %u %lu\n"
- "disk %u %u %u %u\n"
- "page %u %u\n"
- "swap %u %u\n"
- "intr %u",
- kstat.cpu_user,
- kstat.cpu_nice,
- kstat.cpu_system,
- jiffies - (kstat.cpu_user + kstat.cpu_nice + kstat.cpu_system),
- kstat.dk_drive[0],
- kstat.dk_drive[1],
- kstat.dk_drive[2],
- kstat.dk_drive[3],
- kstat.pgpgin,
- kstat.pgpgout,
- kstat.pswpin,
- kstat.pswpout,
- sum);
- for (i = 0 ; i < 16 ; i++)
- len += sprintf(buffer + len, " %u", kstat.interrupts[i]);
- len += sprintf(buffer + len,
- "\nctxt %u\n"
- "btime %lu\n",
- kstat.context_swtch,
- xtime.tv_sec - jiffies / HZ);
- return len;
- }
-
-
- static int get_uptime(char * buffer)
- {
- unsigned long uptime;
- unsigned long idle;
-
- uptime = jiffies;
- idle = task[0]->utime + task[0]->stime;
-
- /* The formula for the fraction parts really is ((t * 100) / HZ) % 100, but
- that would overflow about every five days at HZ == 100.
- Therefore the identity a = (a / b) * b + a % b is used so that it is
- calculated as (((t / HZ) * 100) + ((t % HZ) * 100) / HZ) % 100.
- The part in front of the '+' always evaluates as 0 (mod 100). All divisions
- in the above formulas are truncating. For HZ being a power of 10, the
- calculations simplify to the version in the #else part (if the printf
- format is adapted to the same number of digits as zeroes in HZ.
- */
- #if HZ!=100
- return sprintf(buffer,"%lu.%02lu %lu.%02lu\n",
- uptime / HZ,
- (((uptime % HZ) * 100) / HZ) % 100,
- idle / HZ,
- (((idle % HZ) * 100) / HZ) % 100);
- #else
- return sprintf(buffer,"%lu.%02lu %lu.%02lu\n",
- uptime / HZ,
- uptime % HZ,
- idle / HZ,
- idle % HZ);
- #endif
- }
-
- static int get_meminfo(char * buffer)
- {
- struct sysinfo i;
-
- si_meminfo(&i);
- si_swapinfo(&i);
- return sprintf(buffer, " total: used: free: shared: buffers:\n"
- "Mem: %8lu %8lu %8lu %8lu %8lu\n"
- "Swap: %8lu %8lu %8lu\n",
- i.totalram, i.totalram-i.freeram, i.freeram, i.sharedram, i.bufferram,
- i.totalswap, i.totalswap-i.freeswap, i.freeswap);
- }
-
- static int get_version(char * buffer)
- {
- extern char *linux_banner;
-
- strcpy(buffer, linux_banner);
- return strlen(buffer);
- }
-
- static int get_cpuinfo(char * buffer)
- {
- #ifdef __i386__
- char *model[2][9]={{"DX","SX","DX/2","4","SX/2","6",
- "DX/2-WB","DX/4"},
- {"Pentium 60/66","Pentium 90/100","3",
- "4","5","6","7","8"}};
- char mask[2];
- mask[0] = x86_mask+'@';
- mask[1] = '\0';
- return sprintf(buffer,"cpu\t\t: %c86\n"
- "model\t\t: %s\n"
- "mask\t\t: %s\n"
- "vid\t\t: %s\n"
- "fdiv_bug\t: %s\n"
- "math\t\t: %s\n"
- "hlt\t\t: %s\n"
- "wp\t\t: %s\n"
- "Integrated NPU\t: %s\n"
- "Enhanced VM86\t: %s\n"
- "IO Breakpoints\t: %s\n"
- "4MB Pages\t: %s\n"
- "TS Counters\t: %s\n"
- "Pentium MSR\t: %s\n"
- "Mach. Ch. Exep.\t: %s\n"
- "CMPXCHGB8B\t: %s\n"
- "BogoMips\t: %lu.%02lu\n",
- x86+'0',
- x86_model ? model[x86-4][x86_model-1] : "Unknown",
- x86_mask ? mask : "Unknown",
- x86_vendor_id,
- fdiv_bug ? "yes" : "no",
- hard_math ? "yes" : "no",
- hlt_works_ok ? "yes" : "no",
- wp_works_ok ? "yes" : "no",
- x86_capability & 1 ? "yes" : "no",
- x86_capability & 2 ? "yes" : "no",
- x86_capability & 4 ? "yes" : "no",
- x86_capability & 8 ? "yes" : "no",
- x86_capability & 16 ? "yes" : "no",
- x86_capability & 32 ? "yes" : "no",
- x86_capability & 128 ? "yes" : "no",
- x86_capability & 256 ? "yes" : "no",
- loops_per_sec/500000, (loops_per_sec/5000) % 100
- );
- #else
- return 0;
- #endif
- }
-
- static struct task_struct ** get_task(pid_t pid)
- {
- struct task_struct ** p;
-
- p = task;
- while (++p < task+NR_TASKS) {
- if (*p && (*p)->pid == pid)
- return p;
- }
- return NULL;
- }
-
- static unsigned long get_phys_addr(struct task_struct * p, unsigned long ptr)
- {
- pgd_t *page_dir;
- pmd_t *page_middle;
- pte_t pte;
-
- if (!p || ptr >= TASK_SIZE)
- return 0;
- page_dir = pgd_offset(p,ptr);
- if (pgd_none(*page_dir))
- return 0;
- if (pgd_bad(*page_dir)) {
- printk("bad page directory entry %08lx\n", pgd_val(*page_dir));
- pgd_clear(page_dir);
- return 0;
- }
- page_middle = pmd_offset(page_dir,ptr);
- if (pmd_none(*page_middle))
- return 0;
- if (pmd_bad(*page_middle)) {
- printk("bad page middle entry %08lx\n", pmd_val(*page_middle));
- pmd_clear(page_middle);
- return 0;
- }
- pte = *pte_offset(page_middle,ptr);
- if (!pte_present(pte))
- return 0;
- return pte_page(pte) + (ptr & ~PAGE_MASK);
- }
-
- static int get_array(struct task_struct ** p, unsigned long start, unsigned long end, char * buffer)
- {
- unsigned long addr;
- int size = 0, result = 0;
- char c;
-
- if (start >= end)
- return result;
- for (;;) {
- addr = get_phys_addr(*p, start);
- if (!addr)
- goto ready;
- do {
- c = *(char *) addr;
- if (!c)
- result = size;
- if (size < PAGE_SIZE)
- buffer[size++] = c;
- else
- goto ready;
- addr++;
- start++;
- if (!c && start >= end)
- goto ready;
- } while (addr & ~PAGE_MASK);
- }
- ready:
- /* remove the trailing blanks, used to fill out argv,envp space */
- while (result>0 && buffer[result-1]==' ')
- result--;
- return result;
- }
-
- static int get_env(int pid, char * buffer)
- {
- struct task_struct ** p = get_task(pid);
-
- if (!p || !*p)
- return 0;
- return get_array(p, (*p)->mm->env_start, (*p)->mm->env_end, buffer);
- }
-
- static int get_arg(int pid, char * buffer)
- {
- struct task_struct ** p = get_task(pid);
-
- if (!p || !*p)
- return 0;
- return get_array(p, (*p)->mm->arg_start, (*p)->mm->arg_end, buffer);
- }
-
- static unsigned long get_wchan(struct task_struct *p)
- {
- #ifdef __i386__
- unsigned long ebp, eip;
- unsigned long stack_page;
- int count = 0;
-
- if (!p || p == current || p->state == TASK_RUNNING)
- return 0;
- stack_page = p->kernel_stack_page;
- if (!stack_page)
- return 0;
- ebp = p->tss.ebp;
- do {
- if (ebp < stack_page || ebp >= 4092+stack_page)
- return 0;
- eip = *(unsigned long *) (ebp+4);
- if ((void *)eip != sleep_on &&
- (void *)eip != interruptible_sleep_on)
- return eip;
- ebp = *(unsigned long *) ebp;
- } while (count++ < 16);
- #endif
- return 0;
- }
-
- #define KSTK_EIP(stack) (((unsigned long *)stack)[1019])
- #define KSTK_ESP(stack) (((unsigned long *)stack)[1022])
-
- static int get_stat(int pid, char * buffer)
- {
- struct task_struct ** p = get_task(pid);
- unsigned long sigignore=0, sigcatch=0, bit=1, wchan;
- unsigned long vsize, eip, esp;
- int i,tty_pgrp;
- char state;
-
- if (!p || !*p)
- return 0;
- if ((*p)->state < 0 || (*p)->state > 5)
- state = '.';
- else
- state = "RSDZTD"[(*p)->state];
- eip = esp = 0;
- vsize = (*p)->kernel_stack_page;
- if (vsize) {
- eip = KSTK_EIP(vsize);
- esp = KSTK_ESP(vsize);
- vsize = (*p)->mm->brk - (*p)->mm->start_code + PAGE_SIZE-1;
- if (esp)
- vsize += TASK_SIZE - esp;
- }
- wchan = get_wchan(*p);
- for(i=0; i<32; ++i) {
- switch((unsigned long) (*p)->sigaction[i].sa_handler) {
- case 1: sigignore |= bit; break;
- case 0: break;
- default: sigcatch |= bit;
- } bit <<= 1;
- }
- if ((*p)->tty)
- tty_pgrp = (*p)->tty->pgrp;
- else
- tty_pgrp = -1;
- return sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
- %lu %lu %lu %ld %ld %ld %ld %ld %ld %lu %lu %ld %lu %lu %lu %lu %lu %lu %lu %lu %lu \
- %lu %lu %lu %lu\n",
- pid,
- (*p)->comm,
- state,
- (*p)->p_pptr->pid,
- (*p)->pgrp,
- (*p)->session,
- (*p)->tty ? (*p)->tty->device : 0,
- tty_pgrp,
- (*p)->flags,
- (*p)->mm->min_flt,
- (*p)->mm->cmin_flt,
- (*p)->mm->maj_flt,
- (*p)->mm->cmaj_flt,
- (*p)->utime,
- (*p)->stime,
- (*p)->cutime,
- (*p)->cstime,
- (*p)->counter, /* this is the kernel priority ---
- subtract 30 in your user-level program. */
- (*p)->priority, /* this is the nice value ---
- subtract 15 in your user-level program. */
- (*p)->timeout,
- (*p)->it_real_value,
- (*p)->start_time,
- vsize,
- (*p)->mm->rss, /* you might want to shift this left 3 */
- (*p)->rlim[RLIMIT_RSS].rlim_cur,
- (*p)->mm->start_code,
- (*p)->mm->end_code,
- (*p)->mm->start_stack,
- esp,
- eip,
- (*p)->signal,
- (*p)->blocked,
- sigignore,
- sigcatch,
- wchan);
- }
-
- static inline void statm_pte_range(pmd_t * pmd, unsigned long address, unsigned long size,
- int * pages, int * shared, int * dirty, int * total)
- {
- pte_t * pte;
- unsigned long end;
-
- if (pmd_none(*pmd))
- return;
- if (pmd_bad(*pmd)) {
- printk("statm_pte_range: bad pmd (%08lx)\n", pmd_val(*pmd));
- pmd_clear(pmd);
- return;
- }
- pte = pte_offset(pmd, address);
- address &= ~PMD_MASK;
- end = address + size;
- if (end > PMD_SIZE)
- end = PMD_SIZE;
- do {
- pte_t page = *pte;
-
- address += PAGE_SIZE;
- pte++;
- if (pte_none(page))
- continue;
- ++*total;
- if (!pte_present(page))
- continue;
- ++*pages;
- if (pte_dirty(page))
- ++*dirty;
- if (pte_page(page) >= high_memory)
- continue;
- if (mem_map[MAP_NR(pte_page(page))] > 1)
- ++*shared;
- } while (address < end);
- }
-
- static inline void statm_pmd_range(pgd_t * pgd, unsigned long address, unsigned long size,
- int * pages, int * shared, int * dirty, int * total)
- {
- pmd_t * pmd;
- unsigned long end;
-
- if (pgd_none(*pgd))
- return;
- if (pgd_bad(*pgd)) {
- printk("statm_pmd_range: bad pgd (%08lx)\n", pgd_val(*pgd));
- pgd_clear(pgd);
- return;
- }
- pmd = pmd_offset(pgd, address);
- address &= ~PGDIR_MASK;
- end = address + size;
- if (end > PGDIR_SIZE)
- end = PGDIR_SIZE;
- do {
- statm_pte_range(pmd, address, end - address, pages, shared, dirty, total);
- address = (address + PMD_SIZE) & PMD_MASK;
- pmd++;
- } while (address < end);
- }
-
- static void statm_pgd_range(pgd_t * pgd, unsigned long address, unsigned long end,
- int * pages, int * shared, int * dirty, int * total)
- {
- while (address < end) {
- statm_pmd_range(pgd, address, end - address, pages, shared, dirty, total);
- address = (address + PGDIR_SIZE) & PGDIR_MASK;
- pgd++;
- }
- }
-
- static int get_statm(int pid, char * buffer)
- {
- struct task_struct ** p = get_task(pid);
- int size=0, resident=0, share=0, trs=0, lrs=0, drs=0, dt=0;
-
- if (!p || !*p)
- return 0;
- if ((*p)->state != TASK_ZOMBIE) {
- struct vm_area_struct * vma = (*p)->mm->mmap;
-
- while (vma) {
- pgd_t *pgd = pgd_offset(*p, vma->vm_start);
- int pages = 0, shared = 0, dirty = 0, total = 0;
-
- statm_pgd_range(pgd, vma->vm_start, vma->vm_end, &pages, &shared, &dirty, &total);
- resident += pages;
- share += shared;
- dt += dirty;
- size += total;
- if (vma->vm_flags & VM_EXECUTABLE)
- trs += pages; /* text */
- else if (vma->vm_flags & VM_GROWSDOWN)
- drs += pages; /* stack */
- else if (vma->vm_end > 0x60000000)
- lrs += pages; /* library */
- else
- drs += pages;
- vma = vma->vm_next;
- }
- }
- return sprintf(buffer,"%d %d %d %d %d %d %d\n",
- size, resident, share, trs, lrs, drs, dt);
- }
-
- /*
- * The way we support synthetic files > 4K
- * - without storing their contents in some buffer and
- * - without walking through the entire synthetic file until we reach the
- * position of the requested data
- * is to cleverly encode the current position in the file's f_pos field.
- * There is no requirement that a read() call which returns `count' bytes
- * of data increases f_pos by exactly `count'.
- *
- * This idea is Linus' one. Bruno implemented it.
- */
-
- /*
- * For the /proc/<pid>/maps file, we use fixed length records, each containing
- * a single line.
- */
- #define MAPS_LINE_LENGTH 1024
- #define MAPS_LINE_SHIFT 10
- /*
- * f_pos = (number of the vma in the task->mm->mmap list) * MAPS_LINE_LENGTH
- * + (index into the line)
- */
- #define MAPS_LINE_FORMAT "%08lx-%08lx %s %08lx %02x:%02x %lu\n"
- #define MAPS_LINE_MAX 49 /* sum of 8 1 8 1 4 1 8 1 2 1 2 1 10 1 */
-
- static int read_maps (int pid, struct file * file, char * buf, int count)
- {
- struct task_struct ** p = get_task(pid);
- char * destptr;
- loff_t lineno;
- int column;
- struct vm_area_struct * map;
- int i;
-
- if (!p || !*p)
- return -EINVAL;
-
- if (count == 0)
- return 0;
-
- /* decode f_pos */
- lineno = file->f_pos >> MAPS_LINE_SHIFT;
- column = file->f_pos & (MAPS_LINE_LENGTH-1);
-
- /* quickly go to line lineno */
- for (map = (*p)->mm->mmap, i = 0; map && (i < lineno); map = map->vm_next, i++)
- continue;
-
- destptr = buf;
-
- for ( ; map ; ) {
- /* produce the next line */
- char line[MAPS_LINE_MAX+1];
- char str[5], *cp = str;
- int flags;
- dev_t dev;
- unsigned long ino;
- int len;
-
- flags = map->vm_flags;
-
- *cp++ = flags & VM_READ ? 'r' : '-';
- *cp++ = flags & VM_WRITE ? 'w' : '-';
- *cp++ = flags & VM_EXEC ? 'x' : '-';
- *cp++ = flags & VM_MAYSHARE ? 's' : 'p';
- *cp++ = 0;
-
- if (map->vm_inode != NULL) {
- dev = map->vm_inode->i_dev;
- ino = map->vm_inode->i_ino;
- } else {
- dev = 0;
- ino = 0;
- }
-
- len = sprintf(line, MAPS_LINE_FORMAT,
- map->vm_start, map->vm_end, str, map->vm_offset,
- MAJOR(dev),MINOR(dev), ino);
-
- if (column >= len) {
- column = 0; /* continue with next line at column 0 */
- lineno++;
- map = map->vm_next;
- continue;
- }
-
- i = len-column;
- if (i > count)
- i = count;
- memcpy_tofs(destptr, line+column, i);
- destptr += i; count -= i;
- column += i;
- if (column >= len) {
- column = 0; /* next time: next line at column 0 */
- lineno++;
- map = map->vm_next;
- }
-
- /* done? */
- if (count == 0)
- break;
-
- /* By writing to user space, we might have slept.
- * Stop the loop, to avoid a race condition.
- */
- if (*p != current)
- break;
- }
-
- /* encode f_pos */
- file->f_pos = (lineno << MAPS_LINE_SHIFT) + column;
-
- return destptr-buf;
- }
-
- extern int get_module_list(char *);
- extern int get_device_list(char *);
- extern int get_filesystem_list(char *);
- extern int get_ksyms_list(char *);
- extern int get_irq_list(char *);
- extern int get_dma_list(char *);
- extern int get_cpuinfo(char *);
- extern int get_pci_list(char*);
-
- static int get_root_array(char * page, int type)
- {
- switch (type) {
- case PROC_LOADAVG:
- return get_loadavg(page);
-
- case PROC_UPTIME:
- return get_uptime(page);
-
- case PROC_MEMINFO:
- return get_meminfo(page);
-
- #ifdef CONFIG_PCI
- case PROC_PCI:
- return get_pci_list(page);
- #endif
-
- case PROC_CPUINFO:
- return get_cpuinfo(page);
-
- case PROC_VERSION:
- return get_version(page);
-
- #ifdef CONFIG_DEBUG_MALLOC
- case PROC_MALLOC:
- return get_malloc(page);
- #endif
-
- case PROC_MODULES:
- return get_module_list(page);
-
- case PROC_STAT:
- return get_kstat(page);
-
- case PROC_DEVICES:
- return get_device_list(page);
-
- case PROC_INTERRUPTS:
- return get_irq_list(page);
-
- case PROC_FILESYSTEMS:
- return get_filesystem_list(page);
-
- case PROC_KSYMS:
- return get_ksyms_list(page);
-
- case PROC_DMA:
- return get_dma_list(page);
-
- case PROC_IOPORTS:
- return get_ioport_list(page);
- }
- return -EBADF;
- }
-
- static int get_process_array(char * page, int pid, int type)
- {
- switch (type) {
- case PROC_PID_ENVIRON:
- return get_env(pid, page);
- case PROC_PID_CMDLINE:
- return get_arg(pid, page);
- case PROC_PID_STAT:
- return get_stat(pid, page);
- case PROC_PID_STATM:
- return get_statm(pid, page);
- }
- return -EBADF;
- }
-
-
- static inline int fill_array(char * page, int pid, int type)
- {
- if (pid)
- return get_process_array(page, pid, type);
- return get_root_array(page, type);
- }
-
- static int array_read(struct inode * inode, struct file * file,char * buf, int count)
- {
- unsigned long page;
- int length;
- int end;
- unsigned int type, pid;
-
- if (count < 0)
- return -EINVAL;
- if (!(page = __get_free_page(GFP_KERNEL)))
- return -ENOMEM;
- type = inode->i_ino;
- pid = type >> 16;
- type &= 0x0000ffff;
- length = fill_array((char *) page, pid, type);
- if (length < 0) {
- free_page(page);
- return length;
- }
- if (file->f_pos >= length) {
- free_page(page);
- return 0;
- }
- if (count + file->f_pos > length)
- count = length - file->f_pos;
- end = count + file->f_pos;
- memcpy_tofs(buf, (char *) page + file->f_pos, count);
- free_page(page);
- file->f_pos = end;
- return count;
- }
-
- static struct file_operations proc_array_operations = {
- NULL, /* array_lseek */
- array_read,
- NULL, /* array_write */
- NULL, /* array_readdir */
- NULL, /* array_select */
- NULL, /* array_ioctl */
- NULL, /* mmap */
- NULL, /* no special open code */
- NULL, /* no special release code */
- NULL /* can't fsync */
- };
-
- struct inode_operations proc_array_inode_operations = {
- &proc_array_operations, /* default base directory file-ops */
- NULL, /* create */
- NULL, /* lookup */
- NULL, /* link */
- NULL, /* unlink */
- NULL, /* symlink */
- NULL, /* mkdir */
- NULL, /* rmdir */
- NULL, /* mknod */
- NULL, /* rename */
- NULL, /* readlink */
- NULL, /* follow_link */
- NULL, /* bmap */
- NULL, /* truncate */
- NULL /* permission */
- };
-
- static int arraylong_read (struct inode * inode, struct file * file, char * buf, int count)
- {
- unsigned int pid = inode->i_ino >> 16;
- unsigned int type = inode->i_ino & 0x0000ffff;
-
- if (count < 0)
- return -EINVAL;
-
- switch (type) {
- case PROC_PID_MAPS:
- return read_maps(pid, file, buf, count);
- }
- return -EINVAL;
- }
-
- static struct file_operations proc_arraylong_operations = {
- NULL, /* array_lseek */
- arraylong_read,
- NULL, /* array_write */
- NULL, /* array_readdir */
- NULL, /* array_select */
- NULL, /* array_ioctl */
- NULL, /* mmap */
- NULL, /* no special open code */
- NULL, /* no special release code */
- NULL /* can't fsync */
- };
-
- struct inode_operations proc_arraylong_inode_operations = {
- &proc_arraylong_operations, /* default base directory file-ops */
- NULL, /* create */
- NULL, /* lookup */
- NULL, /* link */
- NULL, /* unlink */
- NULL, /* symlink */
- NULL, /* mkdir */
- NULL, /* rmdir */
- NULL, /* mknod */
- NULL, /* rename */
- NULL, /* readlink */
- NULL, /* follow_link */
- NULL, /* bmap */
- NULL, /* truncate */
- NULL /* permission */
- };
-