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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>
103 lines
3.1 KiB
C
103 lines
3.1 KiB
C
/*
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* Coda File System, Linux Kernel module
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*
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* Original version, adapted from cfs_mach.c, (C) Carnegie Mellon University
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* Linux modifications (C) 1996, Peter J. Braam
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* Rewritten for Linux 2.1 (C) 1997 Carnegie Mellon University
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*
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* Carnegie Mellon University encourages users of this software to
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* contribute improvements to the Coda project.
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*/
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#ifndef _LINUX_CODA_FS
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#define _LINUX_CODA_FS
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#include <linux/kernel.h>
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#include <linux/param.h>
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#include <linux/mm.h>
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#include <linux/vmalloc.h>
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#include <linux/slab.h>
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#include <linux/wait.h>
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#include <linux/types.h>
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#include <linux/fs.h>
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#include <linux/coda_fs_i.h>
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/* operations */
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extern const struct inode_operations coda_dir_inode_operations;
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extern const struct inode_operations coda_file_inode_operations;
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extern const struct inode_operations coda_ioctl_inode_operations;
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extern const struct address_space_operations coda_file_aops;
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extern const struct address_space_operations coda_symlink_aops;
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extern const struct file_operations coda_dir_operations;
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extern const struct file_operations coda_file_operations;
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extern const struct file_operations coda_ioctl_operations;
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/* operations shared over more than one file */
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int coda_open(struct inode *i, struct file *f);
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int coda_flush(struct file *f, fl_owner_t id);
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int coda_release(struct inode *i, struct file *f);
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int coda_permission(struct inode *inode, int mask, struct nameidata *nd);
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int coda_revalidate_inode(struct dentry *);
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int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *);
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int coda_setattr(struct dentry *, struct iattr *);
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/* global variables */
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extern int coda_fake_statfs;
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/* this file: heloers */
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static __inline__ struct CodaFid *coda_i2f(struct inode *);
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static __inline__ char *coda_i2s(struct inode *);
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static __inline__ void coda_flag_inode(struct inode *, int flag);
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char *coda_f2s(struct CodaFid *f);
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int coda_isroot(struct inode *i);
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int coda_iscontrol(const char *name, size_t length);
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void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
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void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
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unsigned short coda_flags_to_cflags(unsigned short);
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/* sysctl.h */
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void coda_sysctl_init(void);
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void coda_sysctl_clean(void);
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#define CODA_ALLOC(ptr, cast, size) do { \
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if (size < PAGE_SIZE) \
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ptr = kmalloc((unsigned long) size, GFP_KERNEL); \
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else \
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ptr = (cast)vmalloc((unsigned long) size); \
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if (!ptr) \
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printk("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
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else memset( ptr, 0, size ); \
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} while (0)
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#define CODA_FREE(ptr,size) \
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do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0)
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/* inode to cnode access functions */
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static inline struct coda_inode_info *ITOC(struct inode *inode)
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{
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return list_entry(inode, struct coda_inode_info, vfs_inode);
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}
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static __inline__ struct CodaFid *coda_i2f(struct inode *inode)
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{
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return &(ITOC(inode)->c_fid);
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}
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static __inline__ char *coda_i2s(struct inode *inode)
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{
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return coda_f2s(&(ITOC(inode)->c_fid));
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}
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/* this will not zap the inode away */
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static __inline__ void coda_flag_inode(struct inode *inode, int flag)
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{
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ITOC(inode)->c_flags |= flag;
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}
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#endif
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