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freebsd-dev/sys/fs/ext2fs/ext2_extern.h

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/* -> /*- for copyright notices, minor format tweaks as necessary
2005-01-06 18:27:30 +00:00
/*-
Main code for the ext2fs filesystem. Please refer to the COPYRIGHT.INFO file for GPL restrictions. This code was ported to the BSD platform by Godmar Back <gback@facility.cs.utah.edu> and specifically to FreeBSD by John Dyson. This code is still green and should be used with caution. Additional changes to UFS necessary to make this code work will be commited seperately. Submitted by: Godmar Back <gback@facility.cs.utah.edu> Obtained from: Lites/Mach4
1995-11-05 23:25:12 +00:00
* modified for EXT2FS support in Lites 1.1
*
* Aug 1995, Godmar Back (gback@cs.utah.edu)
* University of Utah, Department of Computer Science
*/
/*-
* Copyright (c) 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)ffs_extern.h 8.3 (Berkeley) 4/16/94
Support filesystems with the not-so-new "sparse_superblocks" feature. When this feature is enabled, mke2fs doesn't necessarily allocate a super block and its associated descriptor blocks for every group. The (non-)allocations are reflected in the block bitmap. Since the filesystem code doesn't write to these blocks except for the first superblock, all it has to do to support them is to not count them in ext2_statfs() and not attempt to check them at mount time in ext2_check_blocks_bitmap() (the check has never been enabled in FreeBSD anyway).
2000-11-03 16:41:48 +00:00
* $FreeBSD$
Main code for the ext2fs filesystem. Please refer to the COPYRIGHT.INFO file for GPL restrictions. This code was ported to the BSD platform by Godmar Back <gback@facility.cs.utah.edu> and specifically to FreeBSD by John Dyson. This code is still green and should be used with caution. Additional changes to UFS necessary to make this code work will be commited seperately. Submitted by: Godmar Back <gback@facility.cs.utah.edu> Obtained from: Lites/Mach4
1995-11-05 23:25:12 +00:00
*/
Bring in the ext2fs work done by Aditya Sarawgi during and after Google Summer of Code 2009: - BSDL block and inode allocation policies for ext2fs. This involves the use FFS1 style block and inode allocation for ext2fs. Preallocation was removed since it was GPL'd. - Make ext2fs MPSAFE by introducing locks to per-mount datastructures. - Fixes for kern/122047 PR. - Various small bugfixes. - Move out of gnu/ directory. Sponsored by: Google Inc. Submitted by: Aditya Sarawgi <sarawgi.aditya AT SPAMFREE gmail DOT com>
2010-01-14 14:30:54 +00:00
#ifndef _FS_EXT2FS_EXT2_EXTERN_H_
#define _FS_EXT2FS_EXT2_EXTERN_H_
Removed bogus _BEGIN_DECLS/_END_DECLS. Removed unused struct tag declarations in cloned code. Added or cleaned up idempotency ifdefs.
1996-05-01 02:16:17 +00:00
Bring in the ext2fs work done by Aditya Sarawgi during and after Google Summer of Code 2009: - BSDL block and inode allocation policies for ext2fs. This involves the use FFS1 style block and inode allocation for ext2fs. Preallocation was removed since it was GPL'd. - Make ext2fs MPSAFE by introducing locks to per-mount datastructures. - Fixes for kern/122047 PR. - Various small bugfixes. - Move out of gnu/ directory. Sponsored by: Google Inc. Submitted by: Aditya Sarawgi <sarawgi.aditya AT SPAMFREE gmail DOT com>
2010-01-14 14:30:54 +00:00
struct ext2fs_dinode;
Initial implementation of the HTree directory index. This is a port of NetBSD's GSoC 2012 Ext3 HTree directory indexing by Vyacheslav Matyushin. It was cleaned up and enhanced for FreeBSD by Zheng Liu (lz@). This is an excellent example of work shared among different projects: Vyacheslav was able to look at an early prototype from Zheng Liu who was also able to check the code from Haiku (with permission). As in linux, the feature is not available by default and must be enabled explicitly with tune2fs. We still do not support the workarounds required in readdir for NFS. Submitted by: Zheng Liu Tested by: Mike Ma Sponsored by: Google Inc. MFC after: 1 week
2013-07-06 18:28:06 +00:00
struct ext2fs_direct_2;
struct ext2fs_searchslot;
Complete the separation of ext2fs from ufs by copying the remaining shared code and converting all ufs references. Originally it may have made sense to share common features between the two filesystems, but recently it has only caused problems, the UFS2 work being the final straw. All UFS_* indirect calls are now direct calls to ext2_* functions, and ext2fs-specific mount and inode structures have been introduced.
2002-05-16 19:08:03 +00:00
struct indir;
Main code for the ext2fs filesystem. Please refer to the COPYRIGHT.INFO file for GPL restrictions. This code was ported to the BSD platform by Godmar Back <gback@facility.cs.utah.edu> and specifically to FreeBSD by John Dyson. This code is still green and should be used with caution. Additional changes to UFS necessary to make this code work will be commited seperately. Submitted by: Godmar Back <gback@facility.cs.utah.edu> Obtained from: Lites/Mach4
1995-11-05 23:25:12 +00:00
struct inode;
struct mount;
Add function prototypes for most of the new Lite2 functions. Also made a few of the miscfs routines static to be consistent. Some modules simply required some additional #includes to remove -Wall warnings.
1997-02-12 06:52:51 +00:00
struct vfsconf;
Main code for the ext2fs filesystem. Please refer to the COPYRIGHT.INFO file for GPL restrictions. This code was ported to the BSD platform by Godmar Back <gback@facility.cs.utah.edu> and specifically to FreeBSD by John Dyson. This code is still green and should be used with caution. Additional changes to UFS necessary to make this code work will be commited seperately. Submitted by: Godmar Back <gback@facility.cs.utah.edu> Obtained from: Lites/Mach4
1995-11-05 23:25:12 +00:00
struct vnode;
Initial implementation of the HTree directory index. This is a port of NetBSD's GSoC 2012 Ext3 HTree directory indexing by Vyacheslav Matyushin. It was cleaned up and enhanced for FreeBSD by Zheng Liu (lz@). This is an excellent example of work shared among different projects: Vyacheslav was able to look at an early prototype from Zheng Liu who was also able to check the code from Haiku (with permission). As in linux, the feature is not available by default and must be enabled explicitly with tune2fs. We still do not support the workarounds required in readdir for NFS. Submitted by: Zheng Liu Tested by: Mike Ma Sponsored by: Google Inc. MFC after: 1 week
2013-07-06 18:28:06 +00:00
int ext2_add_entry(struct vnode *, struct ext2fs_direct_2 *);
Remove __P.
2002-03-19 22:40:48 +00:00
int ext2_alloc(struct inode *,
Use explicitly-sized types where necessary to make ext2fs work again after the change to a 64-bit daddr_t.
2002-05-18 19:12:38 +00:00
int32_t, int32_t, int, struct ucred *, int32_t *);
Remove __P.
2002-03-19 22:40:48 +00:00
int ext2_balloc(struct inode *,
Define and use e2fs_lbn_t in ext2fs. In line to what is done in UFS, define an internal type e2fs_lbn_t for the logical block numbers. This change is basically a no-op as the new type is unchanged (int32_t) but it may be useful as bumping this may be required for ext4fs. Also, as pointed out by Bruce Evans: -Use daddr_t for daddr in ext2_bmaparray(). This seems to improve reliability with the reallocblks option. - Add a cast to the fsbtodb() macro as in UFS. Reviewed by: bde MFC after: 3 days
2013-06-23 02:44:42 +00:00
e2fs_lbn_t, int, struct ucred *, struct buf **, int);
Remove __P.
2002-03-19 22:40:48 +00:00
int ext2_blkatoff(struct vnode *, off_t, char **, struct buf **);
Use explicitly-sized types where necessary to make ext2fs work again after the change to a 64-bit daddr_t.
2002-05-18 19:12:38 +00:00
void ext2_blkfree(struct inode *, int32_t, long);
Define and use e2fs_lbn_t in ext2fs. In line to what is done in UFS, define an internal type e2fs_lbn_t for the logical block numbers. This change is basically a no-op as the new type is unchanged (int32_t) but it may be useful as bumping this may be required for ext4fs. Also, as pointed out by Bruce Evans: -Use daddr_t for daddr in ext2_bmaparray(). This seems to improve reliability with the reallocblks option. - Add a cast to the fsbtodb() macro as in UFS. Reviewed by: bde MFC after: 3 days
2013-06-23 02:44:42 +00:00
int32_t ext2_blkpref(struct inode *, e2fs_lbn_t, int, int32_t *, int32_t);
Remove __P.
2002-03-19 22:40:48 +00:00
int ext2_bmap(struct vop_bmap_args *);
Add read-only support for extents in ext2fs. Basic support for extents was implemented by Zheng Liu as part of his Google Summer of Code in 2010. This support is read-only at this time. In addition to extents we also support the huge_file extension for read-only purposes. This works nicely with the additional support for birthtime/nanosec timestamps and dir_index that have been added lately. The implementation may not work for all ext4 filesystems as it doesn't support some features that are being enabled by default on recent linux like flex_bg. Nevertheless, the feature should be very useful for migration or simple access in filesystems that have been converted from ext2/3 or don't use incompatible features. Special thanks to Zheng Liu for his dedication and continued work to support ext2 in FreeBSD. Submitted by: Zheng Liu (lz@) Reviewed by: Mike Ma, Christoph Mallon (previous version) Sponsored by: Google Inc. MFC after: 3 weeks
2013-08-12 21:34:48 +00:00
int ext2_bmaparray(struct vnode *, int32_t, int64_t *, int *, int *);
Bring in reallocblk to ext2fs. The feature has been standard for a while in UFS as a means to reduce fragmentation, therefore maintaining consistent performance with filesystem aging. This is also very similar to what ext4 calls "delayed allocation". In his 2010 GSoC, Zheng Liu ported and benchmarked the missing FANCY_REALLOC code to find more consistent performance improvements than with the preallocation approach. PR: 159233 Author: Zheng Liu <gnehzuil AT SPAMFREE gmail DOT com> Sponsored by: Google Inc. Approved by: jhb (mentor) MFC after: 2 weeks
2011-12-15 20:31:18 +00:00
void ext2_clusteracct(struct m_ext2fs *, char *, int, daddr_t, int);
Complete the separation of ext2fs from ufs by copying the remaining shared code and converting all ufs references. Originally it may have made sense to share common features between the two filesystems, but recently it has only caused problems, the UFS2 work being the final straw. All UFS_* indirect calls are now direct calls to ext2_* functions, and ext2fs-specific mount and inode structures have been introduced.
2002-05-16 19:08:03 +00:00
void ext2_dirbad(struct inode *ip, doff_t offset, char *how);
Bring in the ext2fs work done by Aditya Sarawgi during and after Google Summer of Code 2009: - BSDL block and inode allocation policies for ext2fs. This involves the use FFS1 style block and inode allocation for ext2fs. Preallocation was removed since it was GPL'd. - Make ext2fs MPSAFE by introducing locks to per-mount datastructures. - Fixes for kern/122047 PR. - Various small bugfixes. - Move out of gnu/ directory. Sponsored by: Google Inc. Submitted by: Aditya Sarawgi <sarawgi.aditya AT SPAMFREE gmail DOT com>
2010-01-14 14:30:54 +00:00
void ext2_ei2i(struct ext2fs_dinode *, struct inode *);
Use explicitly-sized types where necessary to make ext2fs work again after the change to a 64-bit daddr_t.
2002-05-18 19:12:38 +00:00
int ext2_getlbns(struct vnode *, int32_t, struct indir *, int *);
Bring in the ext2fs work done by Aditya Sarawgi during and after Google Summer of Code 2009: - BSDL block and inode allocation policies for ext2fs. This involves the use FFS1 style block and inode allocation for ext2fs. Preallocation was removed since it was GPL'd. - Make ext2fs MPSAFE by introducing locks to per-mount datastructures. - Fixes for kern/122047 PR. - Various small bugfixes. - Move out of gnu/ directory. Sponsored by: Google Inc. Submitted by: Aditya Sarawgi <sarawgi.aditya AT SPAMFREE gmail DOT com>
2010-01-14 14:30:54 +00:00
void ext2_i2ei(struct inode *, struct ext2fs_dinode *);
Complete the separation of ext2fs from ufs by copying the remaining shared code and converting all ufs references. Originally it may have made sense to share common features between the two filesystems, but recently it has only caused problems, the UFS2 work being the final straw. All UFS_* indirect calls are now direct calls to ext2_* functions, and ext2fs-specific mount and inode structures have been introduced.
2002-05-16 19:08:03 +00:00
void ext2_itimes(struct vnode *vp);
Minor sorting. MFC after: 3 days
2013-06-26 19:43:22 +00:00
int ext2_reallocblks(struct vop_reallocblks_args *);
Remove __P.
2002-03-19 22:40:48 +00:00
int ext2_reclaim(struct vop_reclaim_args *);
Bring in the ext2fs work done by Aditya Sarawgi during and after Google Summer of Code 2009: - BSDL block and inode allocation policies for ext2fs. This involves the use FFS1 style block and inode allocation for ext2fs. Preallocation was removed since it was GPL'd. - Make ext2fs MPSAFE by introducing locks to per-mount datastructures. - Fixes for kern/122047 PR. - Various small bugfixes. - Move out of gnu/ directory. Sponsored by: Google Inc. Submitted by: Aditya Sarawgi <sarawgi.aditya AT SPAMFREE gmail DOT com>
2010-01-14 14:30:54 +00:00
void ext2_setblock(struct m_ext2fs *, u_char *, int32_t);
Remove __P.
2002-03-19 22:40:48 +00:00
int ext2_truncate(struct vnode *, off_t, int, struct ucred *, struct thread *);
int ext2_update(struct vnode *, int);
int ext2_valloc(struct vnode *, int, struct ucred *, struct vnode **);
int ext2_vfree(struct vnode *, ino_t, int);
Back when VOP_* was introduced, we did not have new-style struct initializations but we did have lofty goals and big ideals. Adjust to more contemporary circumstances and gain type checking. Replace the entire vop_t frobbing thing with properly typed structures. The only casualty is that we can not add a new VOP_ method with a loadable module. History has not given us reason to belive this would ever be feasible in the the first place. Eliminate in toto VOCALL(), vop_t, VNODEOP_SET() etc. Give coda correct prototypes and function definitions for all vop_()s. Generate a bit more data from the vnode_if.src file: a struct vop_vector and protype typedefs for all vop methods. Add a new vop_bypass() and make vop_default be a pointer to another struct vop_vector. Remove a lot of vfs_init since vop_vector is ready to use from the compiler. Cast various vop_mumble() to void * with uppercase name, for instance VOP_PANIC, VOP_NULL etc. Implement VCALL() by making vdesc_offset the offsetof() the relevant function pointer in vop_vector. This is disgusting but since the code is generated by a script comparatively safe. The alternative for nullfs etc. would be much worse. Fix up all vnode method vectors to remove casts so they become typesafe. (The bulk of this is generated by scripts)
2004-12-01 23:16:38 +00:00
int ext2_vinit(struct mount *, struct vop_vector *, struct vnode **vpp);
Remove __P.
2002-03-19 22:40:48 +00:00
int ext2_lookup(struct vop_cachedlookup_args *);
int ext2_readdir(struct vop_readdir_args *);
void ext2_print_inode(struct inode *);
int ext2_direnter(struct inode *,
struct vnode *, struct componentname *);
int ext2_dirremove(struct vnode *, struct componentname *);
int ext2_dirrewrite(struct inode *,
struct inode *, struct componentname *);
int ext2_dirempty(struct inode *, ino_t, struct ucred *);
int ext2_checkpath(struct inode *, struct inode *, struct ucred *);
Bring in the ext2fs work done by Aditya Sarawgi during and after Google Summer of Code 2009: - BSDL block and inode allocation policies for ext2fs. This involves the use FFS1 style block and inode allocation for ext2fs. Preallocation was removed since it was GPL'd. - Make ext2fs MPSAFE by introducing locks to per-mount datastructures. - Fixes for kern/122047 PR. - Various small bugfixes. - Move out of gnu/ directory. Sponsored by: Google Inc. Submitted by: Aditya Sarawgi <sarawgi.aditya AT SPAMFREE gmail DOT com>
2010-01-14 14:30:54 +00:00
int cg_has_sb(int i);
Remove __P.
2002-03-19 22:40:48 +00:00
int ext2_inactive(struct vop_inactive_args *);
Initial implementation of the HTree directory index. This is a port of NetBSD's GSoC 2012 Ext3 HTree directory indexing by Vyacheslav Matyushin. It was cleaned up and enhanced for FreeBSD by Zheng Liu (lz@). This is an excellent example of work shared among different projects: Vyacheslav was able to look at an early prototype from Zheng Liu who was also able to check the code from Haiku (with permission). As in linux, the feature is not available by default and must be enabled explicitly with tune2fs. We still do not support the workarounds required in readdir for NFS. Submitted by: Zheng Liu Tested by: Mike Ma Sponsored by: Google Inc. MFC after: 1 week
2013-07-06 18:28:06 +00:00
int ext2_htree_add_entry(struct vnode *, struct ext2fs_direct_2 *,
struct componentname *);
int ext2_htree_create_index(struct vnode *, struct componentname *,
struct ext2fs_direct_2 *);
int ext2_htree_has_idx(struct inode *);
int ext2_htree_hash(const char *, int, uint32_t *, int, uint32_t *,
uint32_t *);
int ext2_htree_lookup(struct inode *, const char *, int, struct buf **,
int *, doff_t *, doff_t *, doff_t *, struct ext2fs_searchslot *);
int ext2_search_dirblock(struct inode *, void *, int *, const char *, int,
int *, doff_t *, doff_t *, doff_t *, struct ext2fs_searchslot *);
Main code for the ext2fs filesystem. Please refer to the COPYRIGHT.INFO file for GPL restrictions. This code was ported to the BSD platform by Godmar Back <gback@facility.cs.utah.edu> and specifically to FreeBSD by John Dyson. This code is still green and should be used with caution. Additional changes to UFS necessary to make this code work will be commited seperately. Submitted by: Godmar Back <gback@facility.cs.utah.edu> Obtained from: Lites/Mach4
1995-11-05 23:25:12 +00:00
Sync with several changes in UFS/FFS: - 77115: Implement support for O_DIRECT. - 98425: Fix a performance issue introduced in 70131 that was causing reads before writes even when writing full blocks. - 98658: Rename the BALLOC flags from B_* to BA_* to avoid confusion with the struct buf B_ flags. - 100344: Merge the BA_ and IO_ flags so so that they may both be used in the same flags word. This merger is possible by assigning the IO_ flags to the low sixteen bits and the BA_ flags the high sixteen bits. - 105422: Fix a file-rewrite performance case. - 129545: Implement IO_INVAL in VOP_WRITE() by marking the buffer as "no cache". - Readd the DOINGASYNC() macro and use it to control asynchronous writes. Change i-node updates to honor DOINGASYNC() instead of always being synchronous. - Use a PRIV_VFS_RETAINSUGID check instead of checking cr_uid against 0 directly when deciding whether or not to clear suid and sgid bits. Submitted by: Pedro F. Giffuni giffunip at yahoo
2011-04-28 14:27:17 +00:00
/* Flags to low-level allocation routines.
* The low 16-bits are reserved for IO_ flags from vnode.h.
*/
#define BA_CLRBUF 0x00010000 /* Clear invalid areas of buffer. */
#define BA_SEQMASK 0x7F000000 /* Bits holding seq heuristic. */
#define BA_SEQSHIFT 24
#define BA_SEQMAX 0x7F
Main code for the ext2fs filesystem. Please refer to the COPYRIGHT.INFO file for GPL restrictions. This code was ported to the BSD platform by Godmar Back <gback@facility.cs.utah.edu> and specifically to FreeBSD by John Dyson. This code is still green and should be used with caution. Additional changes to UFS necessary to make this code work will be commited seperately. Submitted by: Godmar Back <gback@facility.cs.utah.edu> Obtained from: Lites/Mach4
1995-11-05 23:25:12 +00:00
Back when VOP_* was introduced, we did not have new-style struct initializations but we did have lofty goals and big ideals. Adjust to more contemporary circumstances and gain type checking. Replace the entire vop_t frobbing thing with properly typed structures. The only casualty is that we can not add a new VOP_ method with a loadable module. History has not given us reason to belive this would ever be feasible in the the first place. Eliminate in toto VOCALL(), vop_t, VNODEOP_SET() etc. Give coda correct prototypes and function definitions for all vop_()s. Generate a bit more data from the vnode_if.src file: a struct vop_vector and protype typedefs for all vop methods. Add a new vop_bypass() and make vop_default be a pointer to another struct vop_vector. Remove a lot of vfs_init since vop_vector is ready to use from the compiler. Cast various vop_mumble() to void * with uppercase name, for instance VOP_PANIC, VOP_NULL etc. Implement VCALL() by making vdesc_offset the offsetof() the relevant function pointer in vop_vector. This is disgusting but since the code is generated by a script comparatively safe. The alternative for nullfs etc. would be much worse. Fix up all vnode method vectors to remove casts so they become typesafe. (The bulk of this is generated by scripts)
2004-12-01 23:16:38 +00:00
extern struct vop_vector ext2_vnodeops;
extern struct vop_vector ext2_fifoops;
Removed bogus _BEGIN_DECLS/_END_DECLS. Removed unused struct tag declarations in cloned code. Added or cleaned up idempotency ifdefs.
1996-05-01 02:16:17 +00:00
Bring in the ext2fs work done by Aditya Sarawgi during and after Google Summer of Code 2009: - BSDL block and inode allocation policies for ext2fs. This involves the use FFS1 style block and inode allocation for ext2fs. Preallocation was removed since it was GPL'd. - Make ext2fs MPSAFE by introducing locks to per-mount datastructures. - Fixes for kern/122047 PR. - Various small bugfixes. - Move out of gnu/ directory. Sponsored by: Google Inc. Submitted by: Aditya Sarawgi <sarawgi.aditya AT SPAMFREE gmail DOT com>
2010-01-14 14:30:54 +00:00
#endif /* !_FS_EXT2FS_EXT2_EXTERN_H_ */
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