mirror of
git://sourceware.org/git/lvm2.git
synced 2025-01-09 01:18:39 +03:00
d5880f97c5
old dmfs-lv.c thats gone. o Dropped out support for multiple tables in line with ioctl interface o Some reordering to better support the userland library o Updated to 2.4.16 I'm fairly happy with the way that this is working now, so the next job is to start the integration with the ioctl interface so there is a single common dm.[ch] and selectable interfaces (fs or ioctl). Further improvements can be made even now, but I hope to wait until we've got this going and integrated and the libdm parts working as well before investigating other avenues.
123 lines
2.8 KiB
C
123 lines
2.8 KiB
C
/*
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* dmfs-error.c
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*
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* Copyright (C) 2001 Sistina Software
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*
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* This software is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2, or (at
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* your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU CC; see the file COPYING. If not, write to
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* the Free Software Foundation, 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <linux/config.h>
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#include <linux/list.h>
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#include <linux/fs.h>
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#include <linux/seq_file.h>
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#include "dm.h"
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#include "dmfs.h"
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struct dmfs_error {
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struct list_head list;
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unsigned len;
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char *msg;
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};
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static struct dmfs_error oom_error;
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static struct list_head oom_list = {
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next: &oom_error.list,
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prev: &oom_error.list,
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};
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static struct dmfs_error oom_error = {
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list: { next: &oom_list, prev: &oom_list },
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len: 39,
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msg: "Out of memory during creation of table\n",
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};
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void dmfs_add_error(struct inode *inode, unsigned num, char *str)
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{
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struct dmfs_i *dmi = DMFS_I(inode);
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int len = strlen(str) + sizeof(struct dmfs_error) + 12;
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struct dmfs_error *e = kmalloc(len, GFP_KERNEL);
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if (e) {
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e->msg = (char *)(e + 1);
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e->len = sprintf(e->msg, "%8u: %s\n", num, str);
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list_add(&e->list, &dmi->errors);
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}
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}
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void dmfs_zap_errors(struct inode *inode)
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{
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struct dmfs_i *dmi = DMFS_I(inode);
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struct dmfs_error *e;
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while(!list_empty(&dmi->errors)) {
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e = list_entry(dmi->errors.next, struct dmfs_error, list);
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list_del(&e->list);
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kfree(e);
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}
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}
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static void *e_start(struct seq_file *e, loff_t *pos)
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{
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struct list_head *p;
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loff_t n = *pos;
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struct dmfs_i *dmi = e->context;
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down(&dmi->sem);
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if (dmi->status) {
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list_for_each(p, &oom_list)
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if (n-- == 0)
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return list_entry(p, struct dmfs_error, list);
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} else {
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list_for_each(p, &dmi->errors)
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if (n-- == 0)
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return list_entry(p, struct dmfs_error, list);
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}
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return NULL;
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}
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static void *e_next(struct seq_file *e, void *v, loff_t *pos)
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{
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struct dmfs_i *dmi = e->context;
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struct list_head *p = ((struct dmfs_error *)v)->list.next;
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(*pos)++;
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return (p == &dmi->errors) || (p == &oom_list) ? NULL
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: list_entry(p, struct dmfs_error, list);
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}
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static void e_stop(struct seq_file *e, void *v)
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{
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struct dmfs_i *dmi = e->context;
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up(&dmi->sem);
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}
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static int show_error(struct seq_file *e, void *v)
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{
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struct dmfs_error *d = v;
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seq_puts(e, d->msg);
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return 0;
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}
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struct seq_operations dmfs_error_seq_ops = {
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start: e_start,
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next: e_next,
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stop: e_stop,
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show: show_error,
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};
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