From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/fs/hpfs/hpfs_fn.h | 363 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 363 insertions(+) create mode 100644 kernel/fs/hpfs/hpfs_fn.h (limited to 'kernel/fs/hpfs/hpfs_fn.h') diff --git a/kernel/fs/hpfs/hpfs_fn.h b/kernel/fs/hpfs/hpfs_fn.h new file mode 100644 index 000000000..b63b75fa0 --- /dev/null +++ b/kernel/fs/hpfs/hpfs_fn.h @@ -0,0 +1,363 @@ +/* + * linux/fs/hpfs/hpfs_fn.h + * + * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999 + * + * function headers + */ + +//#define DBG +//#define DEBUG_LOCKS +#ifdef pr_fmt +#undef pr_fmt +#endif + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include + +#include "hpfs.h" + +#define EIOERROR EIO +#define EFSERROR EPERM +#define EMEMERROR ENOMEM + +#define ANODE_ALLOC_FWD 512 +#define FNODE_ALLOC_FWD 0 +#define ALLOC_FWD_MIN 16 +#define ALLOC_FWD_MAX 128 +#define ALLOC_M 1 +#define FNODE_RD_AHEAD 16 +#define ANODE_RD_AHEAD 0 +#define DNODE_RD_AHEAD 72 +#define COUNT_RD_AHEAD 62 + +#define FREE_DNODES_ADD 58 +#define FREE_DNODES_DEL 29 + +#define CHKCOND(x,y) if (!(x)) printk y + +struct hpfs_inode_info { + loff_t mmu_private; + ino_t i_parent_dir; /* (directories) gives fnode of parent dir */ + unsigned i_dno; /* (directories) root dnode */ + unsigned i_dpos; /* (directories) temp for readdir */ + unsigned i_dsubdno; /* (directories) temp for readdir */ + unsigned i_file_sec; /* (files) minimalist cache of alloc info */ + unsigned i_disk_sec; /* (files) minimalist cache of alloc info */ + unsigned i_n_secs; /* (files) minimalist cache of alloc info */ + unsigned i_ea_size; /* size of extended attributes */ + unsigned i_ea_mode : 1; /* file's permission is stored in ea */ + unsigned i_ea_uid : 1; /* file's uid is stored in ea */ + unsigned i_ea_gid : 1; /* file's gid is stored in ea */ + unsigned i_dirty : 1; + loff_t **i_rddir_off; + struct inode vfs_inode; +}; + +struct hpfs_sb_info { + struct mutex hpfs_mutex; /* global hpfs lock */ + ino_t sb_root; /* inode number of root dir */ + unsigned sb_fs_size; /* file system size, sectors */ + unsigned sb_bitmaps; /* sector number of bitmap list */ + unsigned sb_dirband_start; /* directory band start sector */ + unsigned sb_dirband_size; /* directory band size, dnodes */ + unsigned sb_dmap; /* sector number of dnode bit map */ + unsigned sb_n_free; /* free blocks for statfs, or -1 */ + unsigned sb_n_free_dnodes; /* free dnodes for statfs, or -1 */ + kuid_t sb_uid; /* uid from mount options */ + kgid_t sb_gid; /* gid from mount options */ + umode_t sb_mode; /* mode from mount options */ + unsigned sb_eas : 2; /* eas: 0-ignore, 1-ro, 2-rw */ + unsigned sb_err : 2; /* on errs: 0-cont, 1-ro, 2-panic */ + unsigned sb_chk : 2; /* checks: 0-no, 1-normal, 2-strict */ + unsigned sb_lowercase : 1; /* downcase filenames hackery */ + unsigned sb_was_error : 1; /* there was an error, set dirty flag */ + unsigned sb_chkdsk : 2; /* chkdsk: 0-no, 1-on errs, 2-allways */ + unsigned char *sb_cp_table; /* code page tables: */ + /* 128 bytes uppercasing table & */ + /* 128 bytes lowercasing table */ + __le32 *sb_bmp_dir; /* main bitmap directory */ + unsigned sb_c_bitmap; /* current bitmap */ + unsigned sb_max_fwd_alloc; /* max forwad allocation */ + int sb_timeshift; + struct rcu_head rcu; +}; + +/* Four 512-byte buffers and the 2k block obtained by concatenating them */ + +struct quad_buffer_head { + struct buffer_head *bh[4]; + void *data; +}; + +/* The b-tree down pointer from a dir entry */ + +static inline dnode_secno de_down_pointer (struct hpfs_dirent *de) +{ + CHKCOND(de->down,("HPFS: de_down_pointer: !de->down\n")); + return le32_to_cpu(*(__le32 *) ((void *) de + le16_to_cpu(de->length) - 4)); +} + +/* The first dir entry in a dnode */ + +static inline struct hpfs_dirent *dnode_first_de (struct dnode *dnode) +{ + return (void *) dnode->dirent; +} + +/* The end+1 of the dir entries */ + +static inline struct hpfs_dirent *dnode_end_de (struct dnode *dnode) +{ + CHKCOND(le32_to_cpu(dnode->first_free)>=0x14 && le32_to_cpu(dnode->first_free)<=0xa00,("HPFS: dnode_end_de: dnode->first_free = %x\n",(unsigned)le32_to_cpu(dnode->first_free))); + return (void *) dnode + le32_to_cpu(dnode->first_free); +} + +/* The dir entry after dir entry de */ + +static inline struct hpfs_dirent *de_next_de (struct hpfs_dirent *de) +{ + CHKCOND(le16_to_cpu(de->length)>=0x20 && le16_to_cpu(de->length)<0x800,("HPFS: de_next_de: de->length = %x\n",(unsigned)le16_to_cpu(de->length))); + return (void *) de + le16_to_cpu(de->length); +} + +static inline struct extended_attribute *fnode_ea(struct fnode *fnode) +{ + return (struct extended_attribute *)((char *)fnode + le16_to_cpu(fnode->ea_offs) + le16_to_cpu(fnode->acl_size_s)); +} + +static inline struct extended_attribute *fnode_end_ea(struct fnode *fnode) +{ + return (struct extended_attribute *)((char *)fnode + le16_to_cpu(fnode->ea_offs) + le16_to_cpu(fnode->acl_size_s) + le16_to_cpu(fnode->ea_size_s)); +} + +static unsigned ea_valuelen(struct extended_attribute *ea) +{ + return ea->valuelen_lo + 256 * ea->valuelen_hi; +} + +static inline struct extended_attribute *next_ea(struct extended_attribute *ea) +{ + return (struct extended_attribute *)((char *)ea + 5 + ea->namelen + ea_valuelen(ea)); +} + +static inline secno ea_sec(struct extended_attribute *ea) +{ + return le32_to_cpu(get_unaligned((__le32 *)((char *)ea + 9 + ea->namelen))); +} + +static inline secno ea_len(struct extended_attribute *ea) +{ + return le32_to_cpu(get_unaligned((__le32 *)((char *)ea + 5 + ea->namelen))); +} + +static inline char *ea_data(struct extended_attribute *ea) +{ + return (char *)((char *)ea + 5 + ea->namelen); +} + +static inline unsigned de_size(int namelen, secno down_ptr) +{ + return ((0x1f + namelen + 3) & ~3) + (down_ptr ? 4 : 0); +} + +static inline void copy_de(struct hpfs_dirent *dst, struct hpfs_dirent *src) +{ + int a; + int n; + if (!dst || !src) return; + a = dst->down; + n = dst->not_8x3; + memcpy((char *)dst + 2, (char *)src + 2, 28); + dst->down = a; + dst->not_8x3 = n; +} + +static inline unsigned tstbits(__le32 *bmp, unsigned b, unsigned n) +{ + int i; + if ((b >= 0x4000) || (b + n - 1 >= 0x4000)) return n; + if (!((le32_to_cpu(bmp[(b & 0x3fff) >> 5]) >> (b & 0x1f)) & 1)) return 1; + for (i = 1; i < n; i++) + if (!((le32_to_cpu(bmp[((b+i) & 0x3fff) >> 5]) >> ((b+i) & 0x1f)) & 1)) + return i + 1; + return 0; +} + +/* alloc.c */ + +int hpfs_chk_sectors(struct super_block *, secno, int, char *); +secno hpfs_alloc_sector(struct super_block *, secno, unsigned, int); +int hpfs_alloc_if_possible(struct super_block *, secno); +void hpfs_free_sectors(struct super_block *, secno, unsigned); +int hpfs_check_free_dnodes(struct super_block *, int); +void hpfs_free_dnode(struct super_block *, secno); +struct dnode *hpfs_alloc_dnode(struct super_block *, secno, dnode_secno *, struct quad_buffer_head *); +struct fnode *hpfs_alloc_fnode(struct super_block *, secno, fnode_secno *, struct buffer_head **); +struct anode *hpfs_alloc_anode(struct super_block *, secno, anode_secno *, struct buffer_head **); + +/* anode.c */ + +secno hpfs_bplus_lookup(struct super_block *, struct inode *, struct bplus_header *, unsigned, struct buffer_head *); +secno hpfs_add_sector_to_btree(struct super_block *, secno, int, unsigned); +void hpfs_remove_btree(struct super_block *, struct bplus_header *); +int hpfs_ea_read(struct super_block *, secno, int, unsigned, unsigned, char *); +int hpfs_ea_write(struct super_block *, secno, int, unsigned, unsigned, const char *); +void hpfs_ea_remove(struct super_block *, secno, int, unsigned); +void hpfs_truncate_btree(struct super_block *, secno, int, unsigned); +void hpfs_remove_fnode(struct super_block *, fnode_secno fno); + +/* buffer.c */ + +void hpfs_prefetch_sectors(struct super_block *, unsigned, int); +void *hpfs_map_sector(struct super_block *, unsigned, struct buffer_head **, int); +void *hpfs_get_sector(struct super_block *, unsigned, struct buffer_head **); +void *hpfs_map_4sectors(struct super_block *, unsigned, struct quad_buffer_head *, int); +void *hpfs_get_4sectors(struct super_block *, unsigned, struct quad_buffer_head *); +void hpfs_brelse4(struct quad_buffer_head *); +void hpfs_mark_4buffers_dirty(struct quad_buffer_head *); + +/* dentry.c */ + +extern const struct dentry_operations hpfs_dentry_operations; + +/* dir.c */ + +struct dentry *hpfs_lookup(struct inode *, struct dentry *, unsigned int); +extern const struct file_operations hpfs_dir_ops; + +/* dnode.c */ + +void hpfs_add_pos(struct inode *, loff_t *); +void hpfs_del_pos(struct inode *, loff_t *); +struct hpfs_dirent *hpfs_add_de(struct super_block *, struct dnode *, + const unsigned char *, unsigned, secno); +int hpfs_add_dirent(struct inode *, const unsigned char *, unsigned, + struct hpfs_dirent *); +int hpfs_remove_dirent(struct inode *, dnode_secno, struct hpfs_dirent *, struct quad_buffer_head *, int); +void hpfs_count_dnodes(struct super_block *, dnode_secno, int *, int *, int *); +dnode_secno hpfs_de_as_down_as_possible(struct super_block *, dnode_secno dno); +struct hpfs_dirent *map_pos_dirent(struct inode *, loff_t *, struct quad_buffer_head *); +struct hpfs_dirent *map_dirent(struct inode *, dnode_secno, + const unsigned char *, unsigned, dnode_secno *, + struct quad_buffer_head *); +void hpfs_remove_dtree(struct super_block *, dnode_secno); +struct hpfs_dirent *map_fnode_dirent(struct super_block *, fnode_secno, struct fnode *, struct quad_buffer_head *); + +/* ea.c */ + +void hpfs_ea_ext_remove(struct super_block *, secno, int, unsigned); +int hpfs_read_ea(struct super_block *, struct fnode *, char *, char *, int); +char *hpfs_get_ea(struct super_block *, struct fnode *, char *, int *); +void hpfs_set_ea(struct inode *, struct fnode *, const char *, + const char *, int); + +/* file.c */ + +int hpfs_file_fsync(struct file *, loff_t, loff_t, int); +void hpfs_truncate(struct inode *); +extern const struct file_operations hpfs_file_ops; +extern const struct inode_operations hpfs_file_iops; +extern const struct address_space_operations hpfs_aops; + +/* inode.c */ + +void hpfs_init_inode(struct inode *); +void hpfs_read_inode(struct inode *); +void hpfs_write_inode(struct inode *); +void hpfs_write_inode_nolock(struct inode *); +int hpfs_setattr(struct dentry *, struct iattr *); +void hpfs_write_if_changed(struct inode *); +void hpfs_evict_inode(struct inode *); + +/* map.c */ + +__le32 *hpfs_map_dnode_bitmap(struct super_block *, struct quad_buffer_head *); +__le32 *hpfs_map_bitmap(struct super_block *, unsigned, struct quad_buffer_head *, char *); +void hpfs_prefetch_bitmap(struct super_block *, unsigned); +unsigned char *hpfs_load_code_page(struct super_block *, secno); +__le32 *hpfs_load_bitmap_directory(struct super_block *, secno bmp); +struct fnode *hpfs_map_fnode(struct super_block *s, ino_t, struct buffer_head **); +struct anode *hpfs_map_anode(struct super_block *s, anode_secno, struct buffer_head **); +struct dnode *hpfs_map_dnode(struct super_block *s, dnode_secno, struct quad_buffer_head *); +dnode_secno hpfs_fnode_dno(struct super_block *s, ino_t ino); + +/* name.c */ + +unsigned char hpfs_upcase(unsigned char *, unsigned char); +int hpfs_chk_name(const unsigned char *, unsigned *); +unsigned char *hpfs_translate_name(struct super_block *, unsigned char *, unsigned, int, int); +int hpfs_compare_names(struct super_block *, const unsigned char *, unsigned, + const unsigned char *, unsigned, int); +int hpfs_is_name_long(const unsigned char *, unsigned); +void hpfs_adjust_length(const unsigned char *, unsigned *); + +/* namei.c */ + +extern const struct inode_operations hpfs_dir_iops; +extern const struct address_space_operations hpfs_symlink_aops; + +static inline struct hpfs_inode_info *hpfs_i(struct inode *inode) +{ + return list_entry(inode, struct hpfs_inode_info, vfs_inode); +} + +static inline struct hpfs_sb_info *hpfs_sb(struct super_block *sb) +{ + return sb->s_fs_info; +} + +/* super.c */ + +__printf(2, 3) +void hpfs_error(struct super_block *, const char *, ...); +int hpfs_stop_cycles(struct super_block *, int, int *, int *, char *); +unsigned hpfs_get_free_dnodes(struct super_block *); + +/* + * local time (HPFS) to GMT (Unix) + */ + +static inline time_t local_to_gmt(struct super_block *s, time32_t t) +{ + extern struct timezone sys_tz; + return t + sys_tz.tz_minuteswest * 60 + hpfs_sb(s)->sb_timeshift; +} + +static inline time32_t gmt_to_local(struct super_block *s, time_t t) +{ + extern struct timezone sys_tz; + return t - sys_tz.tz_minuteswest * 60 - hpfs_sb(s)->sb_timeshift; +} + +/* + * Locking: + * + * hpfs_lock() locks the whole filesystem. It must be taken + * on any method called by the VFS. + * + * We don't do any per-file locking anymore, it is hard to + * review and HPFS is not performance-sensitive anyway. + */ +static inline void hpfs_lock(struct super_block *s) +{ + struct hpfs_sb_info *sbi = hpfs_sb(s); + mutex_lock(&sbi->hpfs_mutex); +} + +static inline void hpfs_unlock(struct super_block *s) +{ + struct hpfs_sb_info *sbi = hpfs_sb(s); + mutex_unlock(&sbi->hpfs_mutex); +} + +static inline void hpfs_lock_assert(struct super_block *s) +{ + struct hpfs_sb_info *sbi = hpfs_sb(s); + WARN_ON(!mutex_is_locked(&sbi->hpfs_mutex)); +} -- cgit 1.2.3-korg