Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 261 insertions, 0 deletions

diff --git a/fs/jffs/jffs_proc.c b/fs/jffs/jffs_proc.c
new file mode 100644
index 000000000000..9bdd99a557c2
--- /dev/null
+++ b/fs/jffs/jffs_proc.c
@@ -0,0 +1,261 @@
+/*
+ * JFFS -- Journaling Flash File System, Linux implementation.
+ *
+ * Copyright (C) 2000  Axis Communications AB.
+ *
+ * Created by Simon Kagstrom <simonk@axis.com>.
+ *
+ * $Id: jffs_proc.c,v 1.5 2001/06/02 14:34:55 dwmw2 Exp $
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ *  Overview:
+ *   This file defines JFFS partition entries in the proc file system.
+ *
+ *  TODO:
+ *   Create some more proc files for different kinds of info, i.e. statistics
+ *   about written and read bytes, number of calls to different routines,
+ *   reports about failures.
+ */
+
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/jffs.h>
+#include <linux/slab.h>
+#include <linux/proc_fs.h>
+#include <linux/time.h>
+#include <linux/types.h>
+#include "jffs_fm.h"
+#include "jffs_proc.h"
+
+/*
+ * Structure for a JFFS partition in the system
+ */
+struct jffs_partition_dir {
+        struct jffs_control *c;
+        struct proc_dir_entry *part_root;
+        struct proc_dir_entry *part_info;
+        struct proc_dir_entry *part_layout;
+        struct jffs_partition_dir *next;
+};
+
+/*
+ * Structure for top-level entry in '/proc/fs' directory
+ */
+struct proc_dir_entry *jffs_proc_root;
+
+/*
+ * Linked list of 'jffs_partition_dirs' to help us track
+ * the mounted JFFS partitions in the system
+ */
+static struct jffs_partition_dir *jffs_part_dirs;
+
+/*
+ * Read functions for entries
+ */
+static int jffs_proc_info_read(char *page, char **start, off_t off,
+                int count, int *eof, void *data);
+static int jffs_proc_layout_read (char *page, char **start, off_t off,
+                int count, int *eof, void *data);
+
+
+/*
+ * Register a JFFS partition directory (called upon mount)
+ */
+int jffs_register_jffs_proc_dir(int mtd, struct jffs_control *c)
+{
+        struct jffs_partition_dir *part_dir;
+        struct proc_dir_entry *part_info = NULL;
+        struct proc_dir_entry *part_layout = NULL;
+        struct proc_dir_entry *part_root = NULL;
+        char name[10];
+
+        sprintf(name, "%d", mtd);
+        /* Allocate structure for local JFFS partition table */
+        part_dir = (struct jffs_partition_dir *)
+                kmalloc(sizeof (struct jffs_partition_dir), GFP_KERNEL);
+        if (!part_dir)
+                goto out;
+
+        /* Create entry for this partition */
+        part_root = proc_mkdir(name, jffs_proc_root);
+        if (!part_root)
+                goto out1;
+
+        /* Create entry for 'info' file */
+        part_info = create_proc_entry ("info", 0, part_root);
+        if (!part_info)
+                goto out2;
+        part_info->read_proc = jffs_proc_info_read;
+        part_info->data = (void *) c;
+
+        /* Create entry for 'layout' file */
+        part_layout = create_proc_entry ("layout", 0, part_root);
+        if (!part_layout)
+                goto out3;
+        part_layout->read_proc = jffs_proc_layout_read;
+        part_layout->data = (void *) c;
+
+        /* Fill in structure for table and insert in the list */
+        part_dir->c = c;
+        part_dir->part_root = part_root;
+        part_dir->part_info = part_info;
+        part_dir->part_layout = part_layout;
+        part_dir->next = jffs_part_dirs;
+        jffs_part_dirs = part_dir;
+
+        /* Return happy */
+        return 0;
+
+out3:
+        remove_proc_entry("info", part_root);
+out2:
+        remove_proc_entry(name, jffs_proc_root);
+out1:
+        kfree(part_dir);
+out:
+        return -ENOMEM;
+}
+
+
+/*
+ * Unregister a JFFS partition directory (called at umount)
+ */
+int jffs_unregister_jffs_proc_dir(struct jffs_control *c)
+{
+        struct jffs_partition_dir *part_dir = jffs_part_dirs;
+        struct jffs_partition_dir *prev_part_dir = NULL;
+
+        while (part_dir) {
+                if (part_dir->c == c) {
+                        /* Remove entries for partition */
+                        remove_proc_entry (part_dir->part_info->name,
+                                part_dir->part_root);
+                        remove_proc_entry (part_dir->part_layout->name,
+                                part_dir->part_root);
+                        remove_proc_entry (part_dir->part_root->name,
+                                jffs_proc_root);
+
+                        /* Remove entry from list */
+                        if (prev_part_dir)
+                                prev_part_dir->next = part_dir->next;
+                        else
+                                jffs_part_dirs = part_dir->next;
+
+                        /*
+                         * Check to see if this is the last one
+                         * and remove the entry from '/proc/fs'
+                         * if it is.
+                         */
+                        if (jffs_part_dirs == part_dir->next)
+                                remove_proc_entry ("jffs", proc_root_fs);
+
+                        /* Free memory for entry */
+                        kfree(part_dir);
+
+                        /* Return happy */
+                        return 0;
+                }
+
+                /* Move to next entry */
+                prev_part_dir = part_dir;
+                part_dir = part_dir->next;
+        }
+
+        /* Return unhappy */
+        return -1;
+}
+
+
+/*
+ * Read a JFFS partition's `info' file
+ */
+static int jffs_proc_info_read (char *page, char **start, off_t off,
+                int count, int *eof, void *data)
+{
+        struct jffs_control *c = (struct jffs_control *) data;
+        int len = 0;
+
+        /* Get information on the parition */
+        len += sprintf (page,
+                "partition size:     %08lX (%u)\n"
+                "sector size:        %08lX (%u)\n"
+                "used size:          %08lX (%u)\n"
+                "dirty size:         %08lX (%u)\n"
+                "free size:          %08lX (%u)\n\n",
+                (unsigned long) c->fmc->flash_size, c->fmc->flash_size,
+                (unsigned long) c->fmc->sector_size, c->fmc->sector_size,
+                (unsigned long) c->fmc->used_size, c->fmc->used_size,
+                (unsigned long) c->fmc->dirty_size, c->fmc->dirty_size,
+                (unsigned long) (c->fmc->flash_size -
+                        (c->fmc->used_size + c->fmc->dirty_size)),
+                c->fmc->flash_size - (c->fmc->used_size + c->fmc->dirty_size));
+
+        /* We're done */
+        *eof = 1;
+
+        /* Return length */
+        return len;
+}
+
+
+/*
+ * Read a JFFS partition's `layout' file
+ */
+static int jffs_proc_layout_read (char *page, char **start, off_t off,
+                int count, int *eof, void *data)
+{
+        struct jffs_control *c = (struct jffs_control *) data;
+        struct jffs_fm *fm = NULL;
+        struct jffs_fm *last_fm = NULL;
+        int len = 0;
+
+        /* Get the first item in the list */
+        fm = c->fmc->head;
+
+        /* Print free space */
+        if (fm && fm->offset) {
+                len += sprintf (page, "00000000 %08lX free\n",
+                        (unsigned long) fm->offset);
+        }
+
+        /* Loop through all of the flash control structures */
+        while (fm && (len < (off + count))) {
+                if (fm->nodes) {
+                        len += sprintf (page + len,
+                                "%08lX %08lX ino=%08lX, ver=%08lX\n",
+                                (unsigned long) fm->offset,
+                                (unsigned long) fm->size,
+                                (unsigned long) fm->nodes->node->ino,
+                                (unsigned long) fm->nodes->node->version);
+                }
+                else {
+                        len += sprintf (page + len,
+                                "%08lX %08lX dirty\n",
+                                (unsigned long) fm->offset,
+                                (unsigned long) fm->size);
+                }
+                last_fm = fm;
+                fm = fm->next;
+        }
+
+        /* Print free space */
+        if ((len < (off + count)) && last_fm
+            && (last_fm->offset < c->fmc->flash_size)) {
+                len += sprintf (page + len,
+                               "%08lX %08lX free\n",
+                               (unsigned long) last_fm->offset + 
+                                last_fm->size,
+                               (unsigned long) (c->fmc->flash_size -
+                                                    (last_fm->offset + last_fm->size)));
+        }
+
+        /* We're done */
+        *eof = 1;
+
+        /* Return length */
+        return len;
+}