linux-stable/fs/isofs/isofs.h

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License cleanup: add SPDX GPL-2.0 license identifier to files with no license Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 14:07:57 +00:00
/* SPDX-License-Identifier: GPL-2.0 */
#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 */
s32 s_sbsector;
unsigned char s_joliet_level;
unsigned char s_mapping;
unsigned char s_check;
unsigned char s_session;
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;
}
static inline struct iso_inode_info *ISOFS_I(struct inode *inode)
{
return container_of(inode, struct iso_inode_info, vfs_inode);
}
static inline int isonum_711(u8 *p)
{
return *p;
}
static inline int isonum_712(s8 *p)
{
return *p;
}
static inline unsigned int isonum_721(u8 *p)
{
return get_unaligned_le16(p);
}
static inline unsigned int isonum_722(u8 *p)
{
return get_unaligned_be16(p);
}
static inline unsigned int isonum_723(u8 *p)
{
/* Ignore bigendian datum due to broken mastering programs */
return get_unaligned_le16(p);
}
static inline unsigned int isonum_731(u8 *p)
{
return get_unaligned_le32(p);
}
static inline unsigned int isonum_732(u8 *p)
{
return get_unaligned_be32(p);
}
static inline unsigned int isonum_733(u8 *p)
{
/* Ignore bigendian datum due to broken mastering programs */
return get_unaligned_le32(p);
}
extern int iso_date(u8 *, 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);
}
static inline struct inode *isofs_iget_reloc(struct super_block *sb,
unsigned long block,
unsigned long offset)
{
return __isofs_iget(sb, block, offset, 1);
}
/* 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);
}
/* 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);
}
}
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;