aboutsummaryrefslogtreecommitdiff
path: root/sys/gnu/ext2fs/ext2_bmap.c
Commit message (Collapse)AuthorAgeFilesLines
* Move ext2fs from src/gnu to src/gnu/fs.Craig Rodrigues2005-06-151-335/+0
| | | | | | | | | | | Discussed on arch@. Reviewed by: kan Approved by: re (blanket), kan Discussed with: dumbbell Notes: svn path=/head/; revision=147401
* /* -> /*- for copyright notices, minor format tweaks as necessaryWarner Losh2005-01-061-1/+1
| | | | Notes: svn path=/head/; revision=139778
* Make VOP_BMAP return a struct bufobj for the underlying storage devicePoul-Henning Kamp2004-11-151-3/+3
| | | | | | | | | | | | instead of a vnode for it. The vnode_pager does not and should not have any interest in what the filesystem uses for backend. (vfs_cluster doesn't use the backing store argument.) Notes: svn path=/head/; revision=137726
* Move EXT2FS to GEOM backing instead of DEVFS.Poul-Henning Kamp2004-10-291-3/+7
| | | | | | | For details, please see src/sys/ufs/ffs/ffs_vfsops.c 1.250. Notes: svn path=/head/; revision=137039
* Move the buffer method vector (buf->b_op) to the bufobj.Poul-Henning Kamp2004-10-241-1/+1
| | | | | | | | | | | | | | | | | | | | Extend it with a strategy method. Add bufstrategy() which do the usual VOP_SPECSTRATEGY/VOP_STRATEGY song and dance. Rename ibwrite to bufwrite(). Move the two NFS buf_ops to more sensible places, add bufstrategy to them. Add inlines for bwrite() and bstrategy() which calls through buf->b_bufobj->b_ops->b_{write,strategy}(). Replace almost all VOP_STRATEGY()/VOP_SPECSTRATEGY() calls with bstrategy(). Notes: svn path=/head/; revision=136927
* Add b_bufobj to struct buf which eventually will eliminate the need for b_vp.Poul-Henning Kamp2004-10-221-1/+1
| | | | | | | | | | | | | | | | | | | | | Initialize b_bufobj for all buffers. Make incore() and gbincore() take a bufobj instead of a vnode. Make inmem() local to vfs_bio.c Change a lot of VI_[UN]LOCK(bp->b_vp) to BO_[UN]LOCK(bp->b_bufobj) also VI_MTX() to BO_MTX(), Make buf_vlist_add() take a bufobj instead of a vnode. Eliminate other uses of bp->b_vp where bp->b_bufobj will do. Various minor polishing: remove "register", turn panic into KASSERT, use new function declarations, TAILQ_FOREACH_SAFE() etc. Notes: svn path=/head/; revision=136767
* Remove advertising clause from University of California Regent'sWarner Losh2004-04-071-4/+0
| | | | | | | | | | license, per letter dated July 22, 1999 and email from Peter Wemm, Alan Cox and Robert Watson. Approved by: core, peter, alc, rwatson Notes: svn path=/head/; revision=128019
* DuH!Poul-Henning Kamp2003-10-181-1/+1
| | | | | | | | bp->b_iooffset (the spot on the disk), not bp->b_offset (the offset in the file) Notes: svn path=/head/; revision=121205
* Initialize bp->b_offset before calling VOP_[SPEC]STRATEGY()Poul-Henning Kamp2003-10-181-0/+1
| | | | Notes: svn path=/head/; revision=121197
* - Add a new 'flags' parameter to getblk().Jeff Roberson2003-03-041-1/+1
| | | | | | | | | | | | | - Define one flag GB_LOCK_NOWAIT that tells getblk() to pass the LK_NOWAIT flag to the initial BUF_LOCK(). This will eventually be used in cases were we want to use a buffer only if it is not currently in use. - Convert all consumers of the getblk() api to use this extra parameter. Reviwed by: arch Not objected to by: mckusick Notes: svn path=/head/; revision=111856
* Convert calls to BUF_STRATEGY to VOP_STRATEGY calls. This is a no-op sincePoul-Henning Kamp2003-01-031-1/+1
| | | | | | | all BUF_STRATEGY did in the first place was call VOP_STRATEGY. Notes: svn path=/head/; revision=108589
* Use explicitly-sized types where necessary to make ext2fs work againIan Dowse2002-05-181-11/+11
| | | | | | | after the change to a 64-bit daddr_t. Notes: svn path=/head/; revision=96877
* Following a repo-copy from src/sys/ufs/ufs, rename functions andIan Dowse2002-05-141-40/+21
| | | | | | | | | | | | | structures etc. to ext2fs-specific names, and remove ufs-specific code that is no longer required. As a first stage, the code will still convert back and forth between the on-disk format and struct inode, so the struct dinode fields have been added to struct inode for now. Note that these files are not yet connected to the build. Notes: svn path=/head/; revision=96596
* Make daddr_t and u_daddr_t 64bits wide.Poul-Henning Kamp2002-05-141-2/+2
| | | | | | | | | Retire daddr64_t and use daddr_t instead. Sponsored by: DARPA & NAI Labs. Notes: svn path=/head/; revision=96572
* Remove register keyword.Poul-Henning Kamp2002-05-131-1/+1
| | | | | | | | Sponsored by: DARPA & NAI Labs. Submitted by: mckusick Notes: svn path=/head/; revision=96506
* Introduce the new 64-bit size disk block, daddr64_t. ChangeKirk McKusick2002-03-151-4/+9
| | | | | | | | | | | | | | | the bio and buffer structures to have daddr64_t bio_pblkno, b_blkno, and b_lblkno fields which allows access to disks larger than a Terabyte in size. This change also requires that the VOP_BMAP vnode operation accept and return daddr64_t blocks. This delta should not affect system operation in any way. It merely sets up the necessary interfaces to allow the development of disk drivers that work with these larger disk block addresses. It also allows for the development of UFS2 which will use 64-bit block addresses. Notes: svn path=/head/; revision=92363
* Remove two unused arguments from ufs_bmaparray().Poul-Henning Kamp2001-04-291-20/+15
| | | | Notes: svn path=/head/; revision=76128
* Revert consequences of changes to mount.h, part 2.Greg Lehey2001-04-291-2/+0
| | | | | | | Requested by: bde Notes: svn path=/head/; revision=76117
* Correct #includes to work with fixed sys/mount.h.Greg Lehey2001-04-231-0/+2
| | | | Notes: svn path=/head/; revision=75858
* This patch corrects the first round of panics and hangs reportedKirk McKusick2000-07-241-1/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | with the new snapshot code. Update addaliasu to correctly implement the semantics of the old checkalias function. When a device vnode first comes into existence, check to see if an anonymous vnode for the same device was created at boot time by bdevvp(). If so, adopt the bdevvp vnode rather than creating a new vnode for the device. This corrects a problem which caused the kernel to panic when taking a snapshot of the root filesystem. Change the calling convention of vn_write_suspend_wait() to be the same as vn_start_write(). Split out softdep_flushworklist() from softdep_flushfiles() so that it can be used to clear the work queue when suspending filesystem operations. Access to buffers becomes recursive so that snapshots can recursively traverse their indirect blocks using ffs_copyonwrite() when checking for the need for copy on write when flushing one of their own indirect blocks. This eliminates a deadlock between the syncer daemon and a process taking a snapshot. Ensure that softdep_process_worklist() can never block because of a snapshot being taken. This eliminates a problem with buffer starvation. Cleanup change in ffs_sync() which did not synchronously wait when MNT_WAIT was specified. The result was an unclean filesystem panic when doing forcible unmount with heavy filesystem I/O in progress. Return a zero'ed block when reading a block that was not in use at the time that a snapshot was taken. Normally, these blocks should never be read. However, the readahead code will occationally read them which can cause unexpected behavior. Clean up the debugging code that ensures that no blocks be written on a filesystem while it is suspended. Snapshots must explicitly label the blocks that they are writing during the suspension so that they do not cause a `write on suspended filesystem' panic. Reorganize ffs_copyonwrite() to eliminate a deadlock and also to prevent a race condition that would permit the same block to be copied twice. This change eliminates an unexpected soft updates inconsistency in fsck caused by the double allocation. Use bqrelse rather than brelse for buffers that will be needed soon again by the snapshot code. This improves snapshot performance. Notes: svn path=/head/; revision=63788
* Add snapshots to the fast filesystem. Most of the changes supportKirk McKusick2000-07-111-7/+16
| | | | | | | | | | | | | | | | | | | | | | | the gating of system calls that cause modifications to the underlying filesystem. The gating can be enabled by any filesystem that needs to consistently suspend operations by adding the vop_stdgetwritemount to their set of vnops. Once gating is enabled, the function vfs_write_suspend stops all new write operations to a filesystem, allows any filesystem modifying system calls already in progress to complete, then sync's the filesystem to disk and returns. The function vfs_write_resume allows the suspended write operations to begin again. Gating is not added by default for all filesystems as for SMP systems it adds two extra locks to such critical kernel paths as the write system call. Thus, gating should only be added as needed. Details on the use and current status of snapshots in FFS can be found in /sys/ufs/ffs/README.snapshot so for brevity and timelyness is not included here. Unless and until you create a snapshot file, these changes should have no effect on your system (famous last words). Notes: svn path=/head/; revision=62976
* Separate the struct bio related stuff out of <sys/buf.h> intoPoul-Henning Kamp2000-05-051-0/+1
| | | | | | | | | | | | | | | | | | <sys/bio.h>. <sys/bio.h> is now a prerequisite for <sys/buf.h> but it shall not be made a nested include according to bdes teachings on the subject of nested includes. Diskdrivers and similar stuff below specfs::strategy() should no longer need to include <sys/buf.> unless they need caching of data. Still a few bogus uses of struct buf to track down. Repocopy by: peter Notes: svn path=/head/; revision=60041
* s/biowait/bufwait/gPoul-Henning Kamp2000-04-291-1/+1
| | | | | | | Prodded by: several. Notes: svn path=/head/; revision=59762
* Remove ~25 unneeded #include <sys/conf.h>Poul-Henning Kamp2000-04-191-1/+0
| | | | | | | Remove ~60 unneeded #include <sys/malloc.h> Notes: svn path=/head/; revision=59391
* Introduce extended attribute support for FFS, allowing arbitraryRobert Watson2000-04-151-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (name, value) pairs to be associated with inodes. This support is used for ACLs, MAC labels, and Capabilities in the TrustedBSD security extensions, which are currently under development. In this implementation, attributes are backed to data vnodes in the style of the quota support in FFS. Support for FFS extended attributes may be enabled using the FFS_EXTATTR kernel option (disabled by default). Userland utilities and man pages will be committed in the next batch. VFS interfaces and man pages have been in the repo since 4.0-RELEASE and are unchanged. o ufs/ufs/extattr.h: UFS-specific extattr defines o ufs/ufs/ufs_extattr.c: bulk of support routines o ufs/{ufs,ffs,mfs}/*.[ch]: hooks and extattr.h includes o contrib/softupdates/ffs_softdep.c: extattr.h includes o conf/options, conf/files, i386/conf/LINT: added FFS_EXTATTR o coda/coda_vfsops.c: XXX required extattr.h due to ufsmount.h (This should not be the case, and will be fixed in a future commit) Currently attributes are not supported in MFS. This will be fixed. Reviewed by: adrian, bp, freebsd-fs, other unthanked souls Obtained from: TrustedBSD Project Notes: svn path=/head/; revision=59241
* Move B_ERROR flag to b_ioflags and call it BIO_ERROR.Poul-Henning Kamp2000-04-021-1/+2
| | | | | | | | | | | | | | | | (Much of this done by script) Move B_ORDERED flag to b_ioflags and call it BIO_ORDERED. Move b_pblkno and b_iodone_chain to struct bio while we transition, they will be obsoleted once bio structs chain/stack. Add bio_queue field for struct bio aware disksort. Address a lot of stylistic issues brought up by bde. Notes: svn path=/head/; revision=58934
* Rename the existing BUF_STRATEGY() to DEV_STRATEGY()Poul-Henning Kamp2000-03-201-1/+1
| | | | | | | | | | | substitute BUF_WRITE(foo) for VOP_BWRITE(foo->b_vp, foo) substitute BUF_STRATEGY(foo) for VOP_STRATEGY(foo->b_vp, foo) This patch is machine generated except for the ccd.c and buf.h parts. Notes: svn path=/head/; revision=58349
* Remove B_READ, B_WRITE and B_FREEBUF and replace them with a newPoul-Henning Kamp2000-03-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | field in struct buf: b_iocmd. The b_iocmd is enforced to have exactly one bit set. B_WRITE was bogusly defined as zero giving rise to obvious coding mistakes. Also eliminate the redundant struct buf flag B_CALL, it can just as efficiently be done by comparing b_iodone to NULL. Should you get a panic or drop into the debugger, complaining about "b_iocmd", don't continue. It is likely to write on your disk where it should have been reading. This change is a step in the direction towards a stackable BIO capability. A lot of this patch were machine generated (Thanks to style(9) compliance!) Vinum users: Greg has not had time to test this yet, be careful. Notes: svn path=/head/; revision=58345
* Bug fixes for currently harmless bugs that could rise to biteKirk McKusick2000-03-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | the unwary if the code were called in slightly different ways. 1) In ufs_bmaparray() the code for calculating 'runb' will stop one block short of the first entry in an indirect block. i.e. if an indirect block contains N block numbers b[0]..b[N-1] then the code will never check if b[0] and b[1] are sequential. For reference, compare with the equivalent code that deals with direct blocks. 2) In ufs_lookup() there is an off-by-one error in the test that checks if dp->i_diroff is outside the range of the the current directory size. This is completely harmless, since the following while-loop condition 'dp->i_offset < endsearch' is never met, so the code immediately does a second pass starting at dp->i_offset = 0. 3) Again in ufs_lookup(), the condition in a sanity check is wrong for directories that are longer than one block. This bug means that the sanity check is only effective for small directories. Submitted by: Ian Dowse <iedowse@maths.tcd.ie> Notes: svn path=/head/; revision=58088
* Remove v_maxio from struct vnode.Poul-Henning Kamp1999-09-291-2/+1
| | | | | | | | | Replace it with mnt_iosize_max in struct mount. Nits from: bde Notes: svn path=/head/; revision=51797
* Fix a harmless bug I introduced, simplify a bit more while here.Poul-Henning Kamp1999-09-201-6/+4
| | | | Notes: svn path=/head/; revision=51483
* Step one of replacing devsw->d_maxio with si_bsize_max.Poul-Henning Kamp1999-09-201-35/+4
| | | | | | | | | | | Rename dev->si_bsize_max to si_iosize_max and set it in spec_open if the device didn't. Set vp->v_maxio from dev->si_bsize_max in spec_open rather than in ufs_bmap.c Notes: svn path=/head/; revision=51479
* $Id$ -> $FreeBSD$Peter Wemm1999-08-281-1/+1
| | | | Notes: svn path=/head/; revision=50477
* The bdevsw() and cdevsw() are now identical, so kill the former.Poul-Henning Kamp1999-08-131-4/+4
| | | | Notes: svn path=/head/; revision=49679
* Decommision miscfs/specfs/specdev.h. Most of it goes into <sys/conf.h>,Poul-Henning Kamp1999-08-081-2/+1
| | | | | | | | | a few lines into <sys/vnode.h>. Add a few fields to struct specinfo, paving the way for the fun part. Notes: svn path=/head/; revision=49535
* I got tired of seeing all the cdevsw[major(foo)] all over the place.Poul-Henning Kamp1999-05-081-4/+4
| | | | | | | | | | | Made a new (inline) function devsw(dev_t dev) and substituted it. Changed to the BDEV variant to this format as well: bdevsw(dev_t dev) DEVFS will eventually benefit from this change too. Notes: svn path=/head/; revision=46676
* Continue where Julian left off in July 1998:Poul-Henning Kamp1999-05-071-4/+4
| | | | | | | | | | | | | | | | | Virtualize bdevsw[] from cdevsw. bdevsw() is now an (inline) function. Join CDEV_MODULE and BDEV_MODULE to DEV_MODULE (please pay attention to the order of the cmaj/bmaj arguments!) Join CDEV_DRIVER_MODULE and BDEV_DRIVER_MODULE to DEV_DRIVER_MODULE (ditto!) (Next step will be to convert all bdev dev_t's to cdev dev_t's before they get to do any damage^H^H^H^H^H^Hwork in the kernel.) Notes: svn path=/head/; revision=46635
* The VFS/BIO subsystem contained a number of hacks in order to optimizeAlan Cox1999-05-021-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | piecemeal, middle-of-file writes for NFS. These hacks have caused no end of trouble, especially when combined with mmap(). I've removed them. Instead, NFS will issue a read-before-write to fully instantiate the struct buf containing the write. NFS does, however, optimize piecemeal appends to files. For most common file operations, you will not notice the difference. The sole remaining fragment in the VFS/BIO system is b_dirtyoff/end, which NFS uses to avoid cache coherency issues with read-merge-write style operations. NFS also optimizes the write-covers-entire-buffer case by avoiding the read-before-write. There is quite a bit of room for further optimization in these areas. The VM system marks pages fully-valid (AKA vm_page_t->valid = VM_PAGE_BITS_ALL) in several places, most noteably in vm_fault. This is not correct operation. The vm_pager_get_pages() code is now responsible for marking VM pages all-valid. A number of VM helper routines have been added to aid in zeroing-out the invalid portions of a VM page prior to the page being marked all-valid. This operation is necessary to properly support mmap(). The zeroing occurs most often when dealing with file-EOF situations. Several bugs have been fixed in the NFS subsystem, including bits handling file and directory EOF situations and buf->b_flags consistancy issues relating to clearing B_ERROR & B_INVAL, and handling B_DONE. getblk() and allocbuf() have been rewritten. B_CACHE operation is now formally defined in comments and more straightforward in implementation. B_CACHE for VMIO buffers is based on the validity of the backing store. B_CACHE for non-VMIO buffers is based simply on whether the buffer is B_INVAL or not (B_CACHE set if B_INVAL clear, and vise-versa). biodone() is now responsible for setting B_CACHE when a successful read completes. B_CACHE is also set when a bdwrite() is initiated and when a bwrite() is initiated. VFS VOP_BWRITE routines (there are only two - nfs_bwrite() and bwrite()) are now expected to set B_CACHE. This means that bowrite() and bawrite() also set B_CACHE indirectly. There are a number of places in the code which were previously using buf->b_bufsize (which is DEV_BSIZE aligned) when they should have been using buf->b_bcount. These have been fixed. getblk() now clears B_DONE on return because the rest of the system is so bad about dealing with B_DONE. Major fixes to NFS/TCP have been made. A server-side bug could cause requests to be lost by the server due to nfs_realign() overwriting other rpc's in the same TCP mbuf chain. The server's kernel must be recompiled to get the benefit of the fixes. Submitted by: Matthew Dillon <dillon@apollo.backplane.com> Notes: svn path=/head/; revision=46349
* Fix warnings in preparation for adding -Wall -Wcast-qual to theMatthew Dillon1999-01-281-2/+2
| | | | | | | kernel compile Notes: svn path=/head/; revision=43311
* Oops, the redundant tests for major numbers weren't redundant here.Bruce Evans1998-10-271-2/+3
| | | | | | | | | | They checked for the magic major number for the "device" behind mfs mount points. Use a more obvious check for this device. Debugged by: Andrew Gallatin <gallatin@cs.duke.edu> Notes: svn path=/head/; revision=40672
* Removed redundant bitrotted checks for major numbers instead of updatingBruce Evans1998-10-261-4/+2
| | | | | | | them. Notes: svn path=/head/; revision=40660
* Quick fix for breakage of read clustering on non-IDE drives. ReadBruce Evans1998-08-181-2/+2
| | | | | | | | | | | | | | | | | clustering is obsolescent technology so hardly anyone noticed. On a DORS 32160 SCSI drive with 4 tags, read clustering makes very little difference even for huge sequential reads. However, on a ZIP SCSI drive with 0 tags, the minimum overhead per block is about 40 msec, so very large clusters must be used to get anywhere near the maximum transfer rate. Using clusters consisting of 1 8K block reduces the transfer rate to about 250K/sec. Under msdosfs, missing read clustering is normal and a cluster size of 1 512 byte block reduces the transfer rate to about 25K/sec. Broken in: rev.1.18 Notes: svn path=/head/; revision=38418
* VOP_STRATEGY grows an (struct vnode *) argumentJulian Elischer1998-07-041-2/+2
| | | | | | | | | as the value in b_vp is often not really what you want. (and needs to be frobbed). more cleanups will follow this. Reviewed by: Bruce Evans <bde@freebsd.org> Notes: svn path=/head/; revision=37384
* Back out DIAGNOSTIC changes.Eivind Eklund1998-02-061-3/+1
| | | | Notes: svn path=/head/; revision=33134
* Turn DIAGNOSTIC into a new-style option.Eivind Eklund1998-02-041-1/+3
| | | | Notes: svn path=/head/; revision=33108
* Add better support for larger I/O clusters, including larger physicalJohn Dyson1998-01-241-6/+38
| | | | | | | | I/O. The support is not mature yet, and some of the underlying implementation needs help. However, support does exist for IDE devices now. Notes: svn path=/head/; revision=32724
* Fixed overflow in ufs_getblns(). For ufs on systems with 32-bit ints,Bruce Evans1997-11-241-7/+14
| | | | | | | | | | | | | triple indirect blocks only worked for block sizes of 4K, since MNINDIR(ump)**3 overflows for larger block sizes (e.g., (8192/4)**3 = 2**33 > INT_MAX). This fix is not the obvious one of changing some types to 64 bits. It rearranges the code to avoid some unnecessary 64-bit calculations. Reviewed by: Kirk McKusick <mckusick@McKusick.COM> Notes: svn path=/head/; revision=31394
* Removed unused #includes.Bruce Evans1997-09-021-3/+1
| | | | Notes: svn path=/head/; revision=29041
* Update a number of routines to reflect the actual nameMike Pritchard1997-03-091-2/+2
| | | | | | | of the routine that caused the panic. Notes: svn path=/head/; revision=23562
* Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are notPeter Wemm1997-02-221-1/+1
| | | | | | | ready for it yet. Notes: svn path=/head/; revision=22975
generated by cgit v1.3 (git 2.53.0) at 2026-08-01 16:23:02 +0000