#include <linux/swapops.h>
#include <linux/mempolicy.h>
#include <linux/namei.h>
+#include <linux/ctype.h>
+#include <linux/migrate.h>
+
#include <asm/uaccess.h>
#include <asm/div64.h>
#include <asm/pgtable.h>
}
#ifdef CONFIG_NUMA
+static inline int shmem_parse_mpol(char *value, int *policy, nodemask_t *policy_nodes)
+{
+ char *nodelist = strchr(value, ':');
+ int err = 1;
+
+ if (nodelist) {
+ /* NUL-terminate policy string */
+ *nodelist++ = '\0';
+ if (nodelist_parse(nodelist, *policy_nodes))
+ goto out;
+ }
+ if (!strcmp(value, "default")) {
+ *policy = MPOL_DEFAULT;
+ /* Don't allow a nodelist */
+ if (!nodelist)
+ err = 0;
+ } else if (!strcmp(value, "prefer")) {
+ *policy = MPOL_PREFERRED;
+ /* Insist on a nodelist of one node only */
+ if (nodelist) {
+ char *rest = nodelist;
+ while (isdigit(*rest))
+ rest++;
+ if (!*rest)
+ err = 0;
+ }
+ } else if (!strcmp(value, "bind")) {
+ *policy = MPOL_BIND;
+ /* Insist on a nodelist */
+ if (nodelist)
+ err = 0;
+ } else if (!strcmp(value, "interleave")) {
+ *policy = MPOL_INTERLEAVE;
+ /* Default to nodes online if no nodelist */
+ if (!nodelist)
+ *policy_nodes = node_online_map;
+ err = 0;
+ }
+out:
+ /* Restore string for error message */
+ if (nodelist)
+ *--nodelist = ':';
+ return err;
+}
+
static struct page *shmem_swapin_async(struct shared_policy *p,
swp_entry_t entry, unsigned long idx)
{
return page;
}
#else
+static inline int shmem_parse_mpol(char *value, int *policy, nodemask_t *policy_nodes)
+{
+ return 1;
+}
+
static inline struct page *
shmem_swapin(struct shmem_inode_info *info,swp_entry_t entry,unsigned long idx)
{
page_cache_release(swappage);
goto repeat;
}
- if (!PageSwapCache(swappage)) {
- /* Page migration has occured */
- shmem_swp_unmap(entry);
- spin_unlock(&info->lock);
- unlock_page(swappage);
- page_cache_release(swappage);
- goto repeat;
- }
if (PageWriteback(swappage)) {
shmem_swp_unmap(entry);
spin_unlock(&info->lock);
return desc.error;
}
-static int shmem_statfs(struct super_block *sb, struct kstatfs *buf)
+static int shmem_statfs(struct dentry *dentry, struct kstatfs *buf)
{
- struct shmem_sb_info *sbinfo = SHMEM_SB(sb);
+ struct shmem_sb_info *sbinfo = SHMEM_SB(dentry->d_sb);
buf->f_type = TMPFS_MAGIC;
buf->f_bsize = PAGE_CACHE_SIZE;
if (!simple_empty(dentry))
return -ENOTEMPTY;
+ dentry->d_inode->i_nlink--;
dir->i_nlink--;
return shmem_unlink(dir, dentry);
}
{
char *this_char, *value, *rest;
- while ((this_char = strsep(&options, ",")) != NULL) {
+ while (options != NULL) {
+ this_char = options;
+ for (;;) {
+ /*
+ * NUL-terminate this option: unfortunately,
+ * mount options form a comma-separated list,
+ * but mpol's nodelist may also contain commas.
+ */
+ options = strchr(options, ',');
+ if (options == NULL)
+ break;
+ options++;
+ if (!isdigit(*options)) {
+ options[-1] = '\0';
+ break;
+ }
+ }
if (!*this_char)
continue;
if ((value = strchr(this_char,'=')) != NULL) {
if (*rest)
goto bad_val;
} else if (!strcmp(this_char,"mpol")) {
- if (!strcmp(value,"default"))
- *policy = MPOL_DEFAULT;
- else if (!strcmp(value,"preferred"))
- *policy = MPOL_PREFERRED;
- else if (!strcmp(value,"bind"))
- *policy = MPOL_BIND;
- else if (!strcmp(value,"interleave"))
- *policy = MPOL_INTERLEAVE;
- else
+ if (shmem_parse_mpol(value,policy,policy_nodes))
goto bad_val;
- } else if (!strcmp(this_char,"mpol_nodelist")) {
- nodelist_parse(value, *policy_nodes);
} else {
printk(KERN_ERR "tmpfs: Bad mount option %s\n",
this_char);
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = TMPFS_MAGIC;
sb->s_op = &shmem_ops;
+ sb->s_time_gran = 1;
inode = shmem_get_inode(sb, S_IFDIR | mode, 0);
if (!inode)
return err;
}
-static kmem_cache_t *shmem_inode_cachep;
+static struct kmem_cache *shmem_inode_cachep;
static struct inode *shmem_alloc_inode(struct super_block *sb)
{
kmem_cache_free(shmem_inode_cachep, SHMEM_I(inode));
}
-static void init_once(void *foo, kmem_cache_t *cachep, unsigned long flags)
+static void init_once(void *foo, struct kmem_cache *cachep,
+ unsigned long flags)
{
struct shmem_inode_info *p = (struct shmem_inode_info *) foo;
.prepare_write = shmem_prepare_write,
.commit_write = simple_commit_write,
#endif
+ .migratepage = migrate_page,
};
static struct file_operations shmem_file_operations = {
};
-static struct super_block *shmem_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int shmem_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_nodev(fs_type, flags, data, shmem_fill_super);
+ return get_sb_nodev(fs_type, flags, data, shmem_fill_super, mnt);
}
static struct file_system_type tmpfs_fs_type = {