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4b6f5d20b0
This is a conversion to make the various file_operations structs in fs/ const. Basically a regexp job, with a few manual fixups The goal is both to increase correctness (harder to accidentally write to shared datastructures) and reducing the false sharing of cachelines with things that get dirty in .data (while .rodata is nicely read only and thus cache clean) Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
102 lines
3.1 KiB
C
102 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 struct inode_operations coda_dir_inode_operations;
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extern struct inode_operations coda_file_inode_operations;
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extern struct inode_operations coda_ioctl_inode_operations;
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extern struct address_space_operations coda_file_aops;
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extern 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);
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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 = (cast)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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