1c7c474c31
Now that we cache the ACL pointers in the generic inode all the generic_acl cruft can go away and generic_acl.c can directly implement xattr handlers dealing with the full Posix ACL semantics for in-memory filesystems. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
#ifndef __SHMEM_FS_H
|
|
#define __SHMEM_FS_H
|
|
|
|
#include <linux/swap.h>
|
|
#include <linux/mempolicy.h>
|
|
|
|
/* inode in-kernel data */
|
|
|
|
#define SHMEM_NR_DIRECT 16
|
|
|
|
struct shmem_inode_info {
|
|
spinlock_t lock;
|
|
unsigned long flags;
|
|
unsigned long alloced; /* data pages alloced to file */
|
|
unsigned long swapped; /* subtotal assigned to swap */
|
|
unsigned long next_index; /* highest alloced index + 1 */
|
|
struct shared_policy policy; /* NUMA memory alloc policy */
|
|
struct page *i_indirect; /* top indirect blocks page */
|
|
swp_entry_t i_direct[SHMEM_NR_DIRECT]; /* first blocks */
|
|
struct list_head swaplist; /* chain of maybes on swap */
|
|
struct inode vfs_inode;
|
|
};
|
|
|
|
struct shmem_sb_info {
|
|
unsigned long max_blocks; /* How many blocks are allowed */
|
|
unsigned long free_blocks; /* How many are left for allocation */
|
|
unsigned long max_inodes; /* How many inodes are allowed */
|
|
unsigned long free_inodes; /* How many are left for allocation */
|
|
spinlock_t stat_lock; /* Serialize shmem_sb_info changes */
|
|
uid_t uid; /* Mount uid for root directory */
|
|
gid_t gid; /* Mount gid for root directory */
|
|
mode_t mode; /* Mount mode for root directory */
|
|
struct mempolicy *mpol; /* default memory policy for mappings */
|
|
};
|
|
|
|
static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
|
|
{
|
|
return container_of(inode, struct shmem_inode_info, vfs_inode);
|
|
}
|
|
|
|
extern int init_tmpfs(void);
|
|
extern int shmem_fill_super(struct super_block *sb, void *data, int silent);
|
|
|
|
#endif
|