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authorRandy Dunlap <randy.dunlap@oracle.com>2007-07-16 10:40:52 +0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-16 20:05:46 +0400
commite73a75fa7f062b52d015f1c961685dcaac57f710 (patch)
treede9c45f6a3c59651f8cea516f88cd1f7f8e31855 /fs/hugetlbfs/inode.c
parent5216184571946b8bbf06f0cd630c7754190fdd1a (diff)
downloadlinux-e73a75fa7f062b52d015f1c961685dcaac57f710.tar.xz
hugetlbfs: use lib/parser, fix docs
Use lib/parser.c to parse hugetlbfs mount options. Correct docs in hugetlbpage.txt. old size of hugetlbfs_fill_super: 675 bytes new size of hugetlbfs_fill_super: 686 bytes (hugetlbfs_parse_options() is inlined) Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Hugh Dickins <hugh@veritas.com> Cc: David Gibson <david@gibson.dropbear.id.au> Cc: Adam Litke <agl@us.ibm.com> Acked-by: William Lee Irwin III <wli@holomorphy.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/hugetlbfs/inode.c')
-rw-r--r--fs/hugetlbfs/inode.c96
1 files changed, 69 insertions, 27 deletions
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index e6b46b3ac2fe..711b801fbcdf 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -13,15 +13,18 @@
#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/file.h>
+#include <linux/kernel.h>
#include <linux/writeback.h>
#include <linux/pagemap.h>
#include <linux/highmem.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/capability.h>
+#include <linux/ctype.h>
#include <linux/backing-dev.h>
#include <linux/hugetlb.h>
#include <linux/pagevec.h>
+#include <linux/parser.h>
#include <linux/mman.h>
#include <linux/quotaops.h>
#include <linux/slab.h>
@@ -47,6 +50,21 @@ static struct backing_dev_info hugetlbfs_backing_dev_info = {
int sysctl_hugetlb_shm_group;
+enum {
+ Opt_size, Opt_nr_inodes,
+ Opt_mode, Opt_uid, Opt_gid,
+ Opt_err,
+};
+
+static match_table_t tokens = {
+ {Opt_size, "size=%s"},
+ {Opt_nr_inodes, "nr_inodes=%s"},
+ {Opt_mode, "mode=%o"},
+ {Opt_uid, "uid=%u"},
+ {Opt_gid, "gid=%u"},
+ {Opt_err, NULL},
+};
+
static void huge_pagevec_release(struct pagevec *pvec)
{
int i;
@@ -594,46 +612,70 @@ static const struct super_operations hugetlbfs_ops = {
static int
hugetlbfs_parse_options(char *options, struct hugetlbfs_config *pconfig)
{
- char *opt, *value, *rest;
+ char *p, *rest;
+ substring_t args[MAX_OPT_ARGS];
+ int option;
if (!options)
return 0;
- while ((opt = strsep(&options, ",")) != NULL) {
- if (!*opt)
- continue;
- value = strchr(opt, '=');
- if (!value || !*value)
- return -EINVAL;
- else
- *value++ = '\0';
-
- if (!strcmp(opt, "uid"))
- pconfig->uid = simple_strtoul(value, &value, 0);
- else if (!strcmp(opt, "gid"))
- pconfig->gid = simple_strtoul(value, &value, 0);
- else if (!strcmp(opt, "mode"))
- pconfig->mode = simple_strtoul(value,&value,0) & 0777U;
- else if (!strcmp(opt, "size")) {
- unsigned long long size = memparse(value, &rest);
+ while ((p = strsep(&options, ",")) != NULL) {
+ int token;
+
+ token = match_token(p, tokens, args);
+ switch (token) {
+ case Opt_uid:
+ if (match_int(&args[0], &option))
+ goto bad_val;
+ pconfig->uid = option;
+ break;
+
+ case Opt_gid:
+ if (match_int(&args[0], &option))
+ goto bad_val;
+ pconfig->gid = option;
+ break;
+
+ case Opt_mode:
+ if (match_octal(&args[0], &option))
+ goto bad_val;
+ pconfig->mode = option & 0777U;
+ break;
+
+ case Opt_size: {
+ unsigned long long size;
+ /* memparse() will accept a K/M/G without a digit */
+ if (!isdigit(*args[0].from))
+ goto bad_val;
+ size = memparse(args[0].from, &rest);
if (*rest == '%') {
size <<= HPAGE_SHIFT;
size *= max_huge_pages;
do_div(size, 100);
- rest++;
}
pconfig->nr_blocks = (size >> HPAGE_SHIFT);
- value = rest;
- } else if (!strcmp(opt,"nr_inodes")) {
- pconfig->nr_inodes = memparse(value, &rest);
- value = rest;
- } else
- return -EINVAL;
+ break;
+ }
- if (*value)
- return -EINVAL;
+ case Opt_nr_inodes:
+ /* memparse() will accept a K/M/G without a digit */
+ if (!isdigit(*args[0].from))
+ goto bad_val;
+ pconfig->nr_inodes = memparse(args[0].from, &rest);
+ break;
+
+ default:
+ printk(KERN_ERR "hugetlbfs: Bad mount option: %s\n", p);
+ return 1;
+ break;
+ }
}
return 0;
+
+bad_val:
+ printk(KERN_ERR "hugetlbfs: Bad value '%s' for mount option '%s'\n",
+ args[0].from, p);
+ return 1;
}
static int