| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* |
| 3 | * Coda File System, Linux Kernel module |
| 4 | * |
| 5 | * Original version, adapted from cfs_mach.c, (C) Carnegie Mellon University |
| 6 | * Linux modifications (C) 1996, Peter J. Braam |
| 7 | * Rewritten for Linux 2.1 (C) 1997 Carnegie Mellon University |
| 8 | * |
| 9 | * Carnegie Mellon University encourages users of this software to |
| 10 | * contribute improvements to the Coda project. |
| 11 | */ |
| 12 | |
| 13 | #ifndef _LINUX_CODA_FS |
| 14 | #define _LINUX_CODA_FS |
| 15 | |
| 16 | #ifdef pr_fmt |
| 17 | #undef pr_fmt |
| 18 | #endif |
| 19 | |
| 20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 21 | |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/param.h> |
| 24 | #include <linux/mm.h> |
| 25 | #include <linux/vmalloc.h> |
| 26 | #include <linux/slab.h> |
| 27 | #include <linux/wait.h> |
| 28 | #include <linux/types.h> |
| 29 | #include <linux/fs.h> |
| 30 | #include "coda_fs_i.h" |
| 31 | |
| 32 | /* operations */ |
| 33 | extern const struct inode_operations coda_dir_inode_operations; |
| 34 | extern const struct inode_operations coda_file_inode_operations; |
| 35 | extern const struct inode_operations coda_ioctl_inode_operations; |
| 36 | |
| 37 | extern const struct dentry_operations coda_dentry_operations; |
| 38 | |
| 39 | extern const struct address_space_operations coda_file_aops; |
| 40 | extern const struct address_space_operations coda_symlink_aops; |
| 41 | |
| 42 | extern const struct file_operations coda_dir_operations; |
| 43 | extern const struct file_operations coda_file_operations; |
| 44 | extern const struct file_operations coda_ioctl_operations; |
| 45 | |
| 46 | /* operations shared over more than one file */ |
| 47 | int coda_open(struct inode *i, struct file *f); |
| 48 | int coda_release(struct inode *i, struct file *f); |
| 49 | int coda_permission(struct inode *inode, int mask); |
| 50 | int coda_revalidate_inode(struct inode *); |
| 51 | int coda_getattr(const struct path *, struct kstat *, u32, unsigned int); |
| 52 | int coda_setattr(struct dentry *, struct iattr *); |
| 53 | |
| 54 | /* this file: heloers */ |
| 55 | char *coda_f2s(struct CodaFid *f); |
| 56 | int coda_iscontrol(const char *name, size_t length); |
| 57 | |
| 58 | void coda_vattr_to_iattr(struct inode *, struct coda_vattr *); |
| 59 | void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *); |
| 60 | unsigned short coda_flags_to_cflags(unsigned short); |
| 61 | |
| 62 | /* sysctl.h */ |
| 63 | void coda_sysctl_init(void); |
| 64 | void coda_sysctl_clean(void); |
| 65 | |
| 66 | #define CODA_ALLOC(ptr, cast, size) do { \ |
| 67 | if (size < PAGE_SIZE) \ |
| 68 | ptr = kzalloc((unsigned long) size, GFP_KERNEL); \ |
| 69 | else \ |
| 70 | ptr = (cast)vzalloc((unsigned long) size); \ |
| 71 | if (!ptr) \ |
| 72 | pr_warn("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \ |
| 73 | } while (0) |
| 74 | |
| 75 | |
| 76 | #define CODA_FREE(ptr, size) kvfree((ptr)) |
| 77 | |
| 78 | /* inode to cnode access functions */ |
| 79 | |
| 80 | static inline struct coda_inode_info *ITOC(struct inode *inode) |
| 81 | { |
| 82 | return container_of(inode, struct coda_inode_info, vfs_inode); |
| 83 | } |
| 84 | |
| 85 | static __inline__ struct CodaFid *coda_i2f(struct inode *inode) |
| 86 | { |
| 87 | return &(ITOC(inode)->c_fid); |
| 88 | } |
| 89 | |
| 90 | static __inline__ char *coda_i2s(struct inode *inode) |
| 91 | { |
| 92 | return coda_f2s(&(ITOC(inode)->c_fid)); |
| 93 | } |
| 94 | |
| 95 | /* this will not zap the inode away */ |
| 96 | static __inline__ void coda_flag_inode(struct inode *inode, int flag) |
| 97 | { |
| 98 | struct coda_inode_info *cii = ITOC(inode); |
| 99 | |
| 100 | spin_lock(&cii->c_lock); |
| 101 | cii->c_flags |= flag; |
| 102 | spin_unlock(&cii->c_lock); |
| 103 | } |
| 104 | |
| 105 | #endif |