c5ef1c42c5
Many struct inode_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
151 lines
4.2 KiB
C
151 lines
4.2 KiB
C
/*
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* Name : qnx4_fs.h
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* Author : Richard Frowijn
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* Function : qnx4 global filesystem definitions
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* Version : 1.0.2
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* Last modified : 2000-01-31
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*
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* History : 23-03-1998 created
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*/
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#ifndef _LINUX_QNX4_FS_H
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#define _LINUX_QNX4_FS_H
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#include <linux/qnxtypes.h>
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#include <linux/magic.h>
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#define QNX4_ROOT_INO 1
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#define QNX4_MAX_XTNTS_PER_XBLK 60
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/* for di_status */
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#define QNX4_FILE_USED 0x01
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#define QNX4_FILE_MODIFIED 0x02
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#define QNX4_FILE_BUSY 0x04
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#define QNX4_FILE_LINK 0x08
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#define QNX4_FILE_INODE 0x10
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#define QNX4_FILE_FSYSCLEAN 0x20
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#define QNX4_I_MAP_SLOTS 8
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#define QNX4_Z_MAP_SLOTS 64
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#define QNX4_VALID_FS 0x0001 /* Clean fs. */
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#define QNX4_ERROR_FS 0x0002 /* fs has errors. */
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#define QNX4_BLOCK_SIZE 0x200 /* blocksize of 512 bytes */
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#define QNX4_BLOCK_SIZE_BITS 9 /* blocksize shift */
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#define QNX4_DIR_ENTRY_SIZE 0x040 /* dir entry size of 64 bytes */
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#define QNX4_DIR_ENTRY_SIZE_BITS 6 /* dir entry size shift */
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#define QNX4_XBLK_ENTRY_SIZE 0x200 /* xblk entry size */
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#define QNX4_INODES_PER_BLOCK 0x08 /* 512 / 64 */
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/* for filenames */
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#define QNX4_SHORT_NAME_MAX 16
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#define QNX4_NAME_MAX 48
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/*
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* This is the original qnx4 inode layout on disk.
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*/
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struct qnx4_inode_entry {
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char di_fname[QNX4_SHORT_NAME_MAX];
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qnx4_off_t di_size;
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qnx4_xtnt_t di_first_xtnt;
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__le32 di_xblk;
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__le32 di_ftime;
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__le32 di_mtime;
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__le32 di_atime;
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__le32 di_ctime;
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qnx4_nxtnt_t di_num_xtnts;
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qnx4_mode_t di_mode;
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qnx4_muid_t di_uid;
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qnx4_mgid_t di_gid;
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qnx4_nlink_t di_nlink;
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__u8 di_zero[4];
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qnx4_ftype_t di_type;
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__u8 di_status;
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};
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struct qnx4_link_info {
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char dl_fname[QNX4_NAME_MAX];
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__le32 dl_inode_blk;
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__u8 dl_inode_ndx;
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__u8 dl_spare[10];
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__u8 dl_status;
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};
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struct qnx4_xblk {
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__le32 xblk_next_xblk;
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__le32 xblk_prev_xblk;
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__u8 xblk_num_xtnts;
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__u8 xblk_spare[3];
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__le32 xblk_num_blocks;
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qnx4_xtnt_t xblk_xtnts[QNX4_MAX_XTNTS_PER_XBLK];
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char xblk_signature[8];
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qnx4_xtnt_t xblk_first_xtnt;
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};
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struct qnx4_super_block {
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struct qnx4_inode_entry RootDir;
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struct qnx4_inode_entry Inode;
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struct qnx4_inode_entry Boot;
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struct qnx4_inode_entry AltBoot;
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};
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#ifdef __KERNEL__
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#define QNX4_DEBUG 0
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#if QNX4_DEBUG
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#define QNX4DEBUG(X) printk X
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#else
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#define QNX4DEBUG(X) (void) 0
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#endif
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struct qnx4_sb_info {
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struct buffer_head *sb_buf; /* superblock buffer */
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struct qnx4_super_block *sb; /* our superblock */
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unsigned int Version; /* may be useful */
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struct qnx4_inode_entry *BitMap; /* useful */
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};
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struct qnx4_inode_info {
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struct qnx4_inode_entry raw;
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loff_t mmu_private;
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struct inode vfs_inode;
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};
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extern struct dentry *qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd);
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extern unsigned long qnx4_count_free_blocks(struct super_block *sb);
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extern unsigned long qnx4_block_map(struct inode *inode, long iblock);
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extern struct buffer_head *qnx4_bread(struct inode *, int, int);
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extern const struct inode_operations qnx4_file_inode_operations;
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extern const struct inode_operations qnx4_dir_inode_operations;
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extern const struct file_operations qnx4_file_operations;
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extern const struct file_operations qnx4_dir_operations;
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extern int qnx4_is_free(struct super_block *sb, long block);
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extern int qnx4_set_bitmap(struct super_block *sb, long block, int busy);
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extern int qnx4_create(struct inode *inode, struct dentry *dentry, int mode, struct nameidata *nd);
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extern void qnx4_truncate(struct inode *inode);
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extern void qnx4_free_inode(struct inode *inode);
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extern int qnx4_unlink(struct inode *dir, struct dentry *dentry);
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extern int qnx4_rmdir(struct inode *dir, struct dentry *dentry);
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extern int qnx4_sync_file(struct file *file, struct dentry *dentry, int);
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extern int qnx4_sync_inode(struct inode *inode);
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static inline struct qnx4_sb_info *qnx4_sb(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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static inline struct qnx4_inode_info *qnx4_i(struct inode *inode)
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{
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return container_of(inode, struct qnx4_inode_info, vfs_inode);
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}
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static inline struct qnx4_inode_entry *qnx4_raw_inode(struct inode *inode)
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{
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return &qnx4_i(inode)->raw;
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}
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#endif /* __KERNEL__ */
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#endif
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