cregit-Linux how code gets into the kernel

Release 4.11 fs/isofs/isofs.h

Directory: fs/isofs
#include <linux/fs.h>
#include <linux/buffer_head.h>
#include <linux/exportfs.h>
#include <linux/iso_fs.h>
#include <asm/unaligned.h>


enum isofs_file_format {
	
isofs_file_normal = 0,
	
isofs_file_sparse = 1,
	
isofs_file_compressed = 2,
};
	
/*
 * iso fs inode data in memory
 */

struct iso_inode_info {
	
unsigned long i_iget5_block;
	
unsigned long i_iget5_offset;
	
unsigned int i_first_extent;
	
unsigned char i_file_format;
	
unsigned char i_format_parm[3];
	
unsigned long i_next_section_block;
	
unsigned long i_next_section_offset;
	
off_t i_section_size;
	
struct inode vfs_inode;
};

/*
 * iso9660 super-block data in memory
 */

struct isofs_sb_info {
	
unsigned long s_ninodes;
	
unsigned long s_nzones;
	
unsigned long s_firstdatazone;
	
unsigned long s_log_zone_size;
	
unsigned long s_max_size;
	
	
int           s_rock_offset; /* offset of SUSP fields within SU area */
	
unsigned char s_joliet_level;
	
unsigned char s_mapping;
	
unsigned int  s_high_sierra:1;
	
unsigned int  s_rock:2;
	
unsigned int  s_utf8:1;
	
unsigned int  s_cruft:1; /* Broken disks with high byte of length
                                  * containing junk */
	
unsigned int  s_nocompress:1;
	
unsigned int  s_hide:1;
	
unsigned int  s_showassoc:1;
	
unsigned int  s_overriderockperm:1;
	
unsigned int  s_uid_set:1;
	
unsigned int  s_gid_set:1;

	
umode_t s_fmode;
	
umode_t s_dmode;
	
kgid_t s_gid;
	
kuid_t s_uid;
	
struct nls_table *s_nls_iocharset; /* Native language support table */
};


#define ISOFS_INVALID_MODE ((umode_t) -1)


static inline struct isofs_sb_info *ISOFS_SB(struct super_block *sb) { return sb->s_fs_info; }

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Al Viro19100.00%1100.00%
Total19100.00%1100.00%


static inline struct iso_inode_info *ISOFS_I(struct inode *inode) { return container_of(inode, struct iso_inode_info, vfs_inode); }

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Al Viro25100.00%1100.00%
Total25100.00%1100.00%


static inline int isonum_711(char *p) { return *(u8 *)p; }

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Al Viro19100.00%1100.00%
Total19100.00%1100.00%


static inline int isonum_712(char *p) { return *(s8 *)p; }

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Al Viro19100.00%1100.00%
Total19100.00%1100.00%


static inline unsigned int isonum_721(char *p) { return get_unaligned_le16(p); }

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PersonTokensPropCommitsCommitProp
Al Viro1794.44%150.00%
Harvey Harrison15.56%150.00%
Total18100.00%2100.00%


static inline unsigned int isonum_722(char *p) { return get_unaligned_be16(p); }

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Al Viro1794.44%150.00%
Harvey Harrison15.56%150.00%
Total18100.00%2100.00%


static inline unsigned int isonum_723(char *p) { /* Ignore bigendian datum due to broken mastering programs */ return get_unaligned_le16(p); }

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Al Viro1894.74%150.00%
Harvey Harrison15.26%150.00%
Total19100.00%2100.00%


static inline unsigned int isonum_731(char *p) { return get_unaligned_le32(p); }

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Al Viro1794.44%150.00%
Harvey Harrison15.56%150.00%
Total18100.00%2100.00%


static inline unsigned int isonum_732(char *p) { return get_unaligned_be32(p); }

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PersonTokensPropCommitsCommitProp
Al Viro1794.44%150.00%
Harvey Harrison15.56%150.00%
Total18100.00%2100.00%


static inline unsigned int isonum_733(char *p) { /* Ignore bigendian datum due to broken mastering programs */ return get_unaligned_le32(p); }

Contributors

PersonTokensPropCommitsCommitProp
Al Viro1894.74%150.00%
Harvey Harrison15.26%150.00%
Total19100.00%2100.00%

extern int iso_date(char *, int); struct inode; /* To make gcc happy */ extern int parse_rock_ridge_inode(struct iso_directory_record *, struct inode *, int relocated); extern int get_rock_ridge_filename(struct iso_directory_record *, char *, struct inode *); extern int isofs_name_translate(struct iso_directory_record *, char *, struct inode *); int get_joliet_filename(struct iso_directory_record *, unsigned char *, struct inode *); int get_acorn_filename(struct iso_directory_record *, char *, struct inode *); extern struct dentry *isofs_lookup(struct inode *, struct dentry *, unsigned int flags); extern struct buffer_head *isofs_bread(struct inode *, sector_t); extern int isofs_get_blocks(struct inode *, sector_t, struct buffer_head **, unsigned long); struct inode *__isofs_iget(struct super_block *sb, unsigned long block, unsigned long offset, int relocated);
static inline struct inode *isofs_iget(struct super_block *sb, unsigned long block, unsigned long offset) { return __isofs_iget(sb, block, offset, 0); }

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Jan Kara34100.00%1100.00%
Total34100.00%1100.00%


static inline struct inode *isofs_iget_reloc(struct super_block *sb, unsigned long block, unsigned long offset) { return __isofs_iget(sb, block, offset, 1); }

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Jan Kara34100.00%1100.00%
Total34100.00%1100.00%

/* Because the inode number is no longer relevant to finding the * underlying meta-data for an inode, we are free to choose a more * convenient 32-bit number as the inode number. The inode numbering * scheme was recommended by Sergey Vlasov and Eric Lammerts. */
static inline unsigned long isofs_get_ino(unsigned long block, unsigned long offset, unsigned long bufbits) { return (block << (bufbits - 5)) | (offset >> 5); }

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Al Viro37100.00%1100.00%
Total37100.00%1100.00%

/* Every directory can have many redundant directory entries scattered * throughout the directory tree. First there is the directory entry * with the name of the directory stored in the parent directory. * Then, there is the "." directory entry stored in the directory * itself. Finally, there are possibly many ".." directory entries * stored in all the subdirectories. * * In order for the NFS get_parent() method to work and for the * general consistency of the dcache, we need to make sure the * "i_iget5_block" and "i_iget5_offset" all point to exactly one of * the many redundant entries for each directory. We normalize the * block and offset by always making them point to the "." directory. * * Notice that we do not use the entry for the directory with the name * that is located in the parent directory. Even though choosing this * first directory is more natural, it is much easier to find the "." * entry in the NFS get_parent() method because it is implicitly * encoded in the "extent + ext_attr_length" fields of _all_ the * redundant entries for the directory. Thus, it can always be * reached regardless of which directory entry you have in hand. * * This works because the "." entry is simply the first directory * record when you start reading the file that holds all the directory * records, and this file starts at "extent + ext_attr_length" blocks. * Because the "." entry is always the first entry listed in the * directories file, the normalized "offset" value is always 0. * * You should pass the directory entry in "de". On return, "block" * and "offset" will hold normalized values. Only directories are * affected making it safe to call even for non-directory file * types. */
static inline void isofs_normalize_block_and_offset(struct iso_directory_record* de, unsigned long *block, unsigned long *offset) { /* Only directories are normalized. */ if (de->flags[0] & 2) { *offset = 0; *block = (unsigned long)isonum_733(de->extent) + (unsigned long)isonum_711(de->ext_attr_length); } }

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Al Viro66100.00%1100.00%
Total66100.00%1100.00%

extern const struct inode_operations isofs_dir_inode_operations; extern const struct file_operations isofs_dir_operations; extern const struct address_space_operations isofs_symlink_aops; extern const struct export_operations isofs_export_ops;

Overall Contributors

PersonTokensPropCommitsCommitProp
Al Viro60380.29%318.75%
Jan Kara12716.91%531.25%
Jeremy White60.80%16.25%
Harvey Harrison60.80%16.25%
Christoph Hellwig50.67%318.75%
Arjan van de Ven20.27%212.50%
Eric W. Biedermann20.27%16.25%
Total751100.00%16100.00%
Directory: fs/isofs
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