}
}
-/*
+/**
* shmem_recalc_inode - recalculate the size of an inode
- *
* @inode: inode to recalc
*
* We have to calculate the free blocks since the mm can drop
}
}
-/*
+/**
* shmem_swp_entry - find the swap vector position in the info structure
- *
* @info: info structure for the inode
* @index: index of the page to find
* @page: optional page to add to the structure. Has to be preset to
}
}
-/*
+/**
* shmem_swp_alloc - get the position of the swap entry for the page.
- * If it does not exist allocate the entry.
- *
* @info: info structure for the inode
* @index: index of the page to find
* @sgp: check and recheck i_size? skip allocation?
+ *
+ * If the entry does not exist, allocate it.
*/
static swp_entry_t *shmem_swp_alloc(struct shmem_inode_info *info, unsigned long index, enum sgp_type sgp)
{
return entry;
}
-/*
+/**
* shmem_free_swp - free some swap entries in a directory
- *
* @dir: pointer to the directory
* @edir: pointer after last entry of the directory
* @punch_lock: pointer to spinlock when needed for the holepunch case
#ifdef CONFIG_NUMA
#ifdef CONFIG_TMPFS
-static int shmem_parse_mpol(char *value, int *policy, nodemask_t *policy_nodes)
+static int shmem_parse_mpol(char *value, unsigned short *policy,
+ unsigned short *mode_flags, nodemask_t *policy_nodes)
{
char *nodelist = strchr(value, ':');
+ char *flags = strchr(value, '=');
int err = 1;
if (nodelist) {
if (!nodes_subset(*policy_nodes, node_states[N_HIGH_MEMORY]))
goto out;
}
+ if (flags)
+ *flags++ = '\0';
if (!strcmp(value, "default")) {
*policy = MPOL_DEFAULT;
/* Don't allow a nodelist */
*policy_nodes = node_states[N_HIGH_MEMORY];
err = 0;
}
+
+ *mode_flags = 0;
+ if (flags) {
+ /*
+ * Currently, we only support two mutually exclusive
+ * mode flags.
+ */
+ if (!strcmp(flags, "static"))
+ *mode_flags |= MPOL_F_STATIC_NODES;
+ else if (!strcmp(flags, "relative"))
+ *mode_flags |= MPOL_F_RELATIVE_NODES;
+ else
+ err = 1; /* unrecognized flag */
+ }
out:
/* Restore string for error message */
if (nodelist)
*--nodelist = ':';
+ if (flags)
+ *--flags = '=';
return err;
}
-static void shmem_show_mpol(struct seq_file *seq, int policy,
- const nodemask_t policy_nodes)
+static void shmem_show_mpol(struct seq_file *seq, unsigned short policy,
+ unsigned short flags, const nodemask_t policy_nodes)
{
char *policy_string;
pvma.vm_ops = NULL;
pvma.vm_policy = mpol_shared_policy_lookup(&info->policy, idx);
page = swapin_readahead(entry, gfp, &pvma, 0);
- mpol_free(pvma.vm_policy);
+ mpol_put(pvma.vm_policy);
return page;
}
pvma.vm_ops = NULL;
pvma.vm_policy = mpol_shared_policy_lookup(&info->policy, idx);
page = alloc_page_vma(gfp, &pvma, 0);
- mpol_free(pvma.vm_policy);
+ mpol_put(pvma.vm_policy);
return page;
}
#else /* !CONFIG_NUMA */
#ifdef CONFIG_TMPFS
-static inline int shmem_parse_mpol(char *value, int *policy,
- nodemask_t *policy_nodes)
+static inline int shmem_parse_mpol(char *value, unsigned short *policy,
+ unsigned short *mode_flags, nodemask_t *policy_nodes)
{
return 1;
}
-static inline void shmem_show_mpol(struct seq_file *seq, int policy,
- const nodemask_t policy_nodes)
+static inline void shmem_show_mpol(struct seq_file *seq, unsigned short policy,
+ unsigned short flags, const nodemask_t policy_nodes)
{
}
#endif /* CONFIG_TMPFS */
shmem_swp_unmap(entry);
spin_unlock(&info->lock);
unlock_page(swappage);
- page_cache_release(swappage);
if (error == -ENOMEM) {
/* allow reclaim from this memory cgroup */
- error = mem_cgroup_cache_charge(NULL,
+ error = mem_cgroup_cache_charge(swappage,
current->mm, gfp & ~__GFP_HIGHMEM);
- if (error)
+ if (error) {
+ page_cache_release(swappage);
goto failed;
+ }
+ mem_cgroup_uncharge_page(swappage);
}
+ page_cache_release(swappage);
goto repeat;
}
} else if (sgp == SGP_READ && !filepage) {
inode->i_op = &shmem_inode_operations;
inode->i_fop = &shmem_file_operations;
mpol_shared_policy_init(&info->policy, sbinfo->policy,
- &sbinfo->policy_nodes);
+ sbinfo->flags, &sbinfo->policy_nodes);
break;
case S_IFDIR:
inc_nlink(inode);
* Must not load anything in the rbtree,
* mpol_free_shared_policy will not be called.
*/
- mpol_shared_policy_init(&info->policy, MPOL_DEFAULT,
+ mpol_shared_policy_init(&info->policy, MPOL_DEFAULT, 0,
NULL);
break;
}
};
#ifdef CONFIG_TMPFS_POSIX_ACL
-/**
+/*
* Superblocks without xattr inode operations will get security.* xattr
* support from the VFS "for free". As soon as we have any other xattrs
* like ACLs, we also need to implement the security.* handlers at
goto bad_val;
} else if (!strcmp(this_char,"mpol")) {
if (shmem_parse_mpol(value, &sbinfo->policy,
- &sbinfo->policy_nodes))
+ &sbinfo->flags, &sbinfo->policy_nodes))
goto bad_val;
} else {
printk(KERN_ERR "tmpfs: Bad mount option %s\n",
sbinfo->max_inodes = config.max_inodes;
sbinfo->free_inodes = config.max_inodes - inodes;
sbinfo->policy = config.policy;
+ sbinfo->flags = config.flags;
sbinfo->policy_nodes = config.policy_nodes;
out:
spin_unlock(&sbinfo->stat_lock);
seq_printf(seq, ",uid=%u", sbinfo->uid);
if (sbinfo->gid != 0)
seq_printf(seq, ",gid=%u", sbinfo->gid);
- shmem_show_mpol(seq, sbinfo->policy, sbinfo->policy_nodes);
+ shmem_show_mpol(seq, sbinfo->policy, sbinfo->flags,
+ sbinfo->policy_nodes);
return 0;
}
#endif /* CONFIG_TMPFS */
sbinfo->uid = current->fsuid;
sbinfo->gid = current->fsgid;
sbinfo->policy = MPOL_DEFAULT;
+ sbinfo->flags = 0;
sbinfo->policy_nodes = node_states[N_HIGH_MEMORY];
sb->s_fs_info = sbinfo;
}
module_init(init_tmpfs)
-/*
+/**
* shmem_file_setup - get an unlinked file living in tmpfs
- *
* @name: name for dentry (to be seen in /proc/<pid>/maps
* @size: size to be set for the file
- *
+ * @flags: vm_flags
*/
struct file *shmem_file_setup(char *name, loff_t size, unsigned long flags)
{
return ERR_PTR(error);
}
-/*
+/**
* shmem_zero_setup - setup a shared anonymous mapping
- *
* @vma: the vma to be mmapped is prepared by do_mmap_pgoff
*/
int shmem_zero_setup(struct vm_area_struct *vma)