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2018-11-10ufs: we need to sync inode before freeing itAl Viro
[ Upstream commit 67a70017fa0a152657bc7e337e69bb9c9f5549bf ] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Sasha Levin <sashal@kernel.org>
2017-06-14ufs_getfrag_block(): we only grab ->truncate_mutex on block creation pathAl Viro
commit 006351ac8ead0d4a67dd3845e3ceffe650a23212 upstream. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-14ufs_extend_tail(): fix the braino in calling conventions of ufs_new_fragments()Al Viro
commit 940ef1a0ed939c2ca029fca715e25e7778ce1e34 upstream. ... and it really needs splitting into "new" and "extend" cases, but that's for later Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-14ufs: restore proper tail allocationAl Viro
commit 8785d84d002c2ce0f68fbcd6c2c86be859802c7e upstream. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-10Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull more vfs updates from Al Viro: ">rename2() work from Miklos + current_time() from Deepa" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: fs: Replace current_fs_time() with current_time() fs: Replace CURRENT_TIME_SEC with current_time() for inode timestamps fs: Replace CURRENT_TIME with current_time() for inode timestamps fs: proc: Delete inode time initializations in proc_alloc_inode() vfs: Add current_time() api vfs: add note about i_op->rename changes to porting fs: rename "rename2" i_op to "rename" vfs: remove unused i_op->rename fs: make remaining filesystems use .rename2 libfs: support RENAME_NOREPLACE in simple_rename() fs: support RENAME_NOREPLACE for local filesystems ncpfs: fix unused variable warning
2016-09-27fs: Replace CURRENT_TIME_SEC with current_time() for inode timestampsDeepa Dinamani
CURRENT_TIME_SEC is not y2038 safe. current_time() will be transitioned to use 64 bit time along with vfs in a separate patch. There is no plan to transistion CURRENT_TIME_SEC to use y2038 safe time interfaces. current_time() will also be extended to use superblock range checking parameters when range checking is introduced. This works because alloc_super() fills in the the s_time_gran in super block to NSEC_PER_SEC. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-09-22fs: Give dentry to inode_change_ok() instead of inodeJan Kara
inode_change_ok() will be resposible for clearing capabilities and IMA extended attributes and as such will need dentry. Give it as an argument to inode_change_ok() instead of an inode. Also rename inode_change_ok() to setattr_prepare() to better relect that it does also some modifications in addition to checks. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
2016-04-04mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macrosKirill A. Shutemov
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time ago with promise that one day it will be possible to implement page cache with bigger chunks than PAGE_SIZE. This promise never materialized. And unlikely will. We have many places where PAGE_CACHE_SIZE assumed to be equal to PAGE_SIZE. And it's constant source of confusion on whether PAGE_CACHE_* or PAGE_* constant should be used in a particular case, especially on the border between fs and mm. Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much breakage to be doable. Let's stop pretending that pages in page cache are special. They are not. The changes are pretty straight-forward: - <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN}; - page_cache_get() -> get_page(); - page_cache_release() -> put_page(); This patch contains automated changes generated with coccinelle using script below. For some reason, coccinelle doesn't patch header files. I've called spatch for them manually. The only adjustment after coccinelle is revert of changes to PAGE_CAHCE_ALIGN definition: we are going to drop it later. There are few places in the code where coccinelle didn't reach. I'll fix them manually in a separate patch. Comments and documentation also will be addressed with the separate patch. virtual patch @@ expression E; @@ - E << (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ expression E; @@ - E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ @@ - PAGE_CACHE_SHIFT + PAGE_SHIFT @@ @@ - PAGE_CACHE_SIZE + PAGE_SIZE @@ @@ - PAGE_CACHE_MASK + PAGE_MASK @@ expression E; @@ - PAGE_CACHE_ALIGN(E) + PAGE_ALIGN(E) @@ expression E; @@ - page_cache_get(E) + get_page(E) @@ expression E; @@ - page_cache_release(E) + put_page(E) Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-12-08don't put symlink bodies in pagecache into highmemAl Viro
kmap() in page_follow_link_light() needed to go - allowing to hold an arbitrary number of kmaps for long is a great way to deadlocking the system. new helper (inode_nohighmem(inode)) needs to be used for pagecache symlinks inodes; done for all in-tree cases. page_follow_link_light() instrumented to yell about anything missed. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-12-06ufs: get rid of ->setattr() for symlinksAl Viro
It was to needed for a couple of months in 2010, until UFS quota support got dropped. Since then it's equivalent to simple_setattr() (i.e. the default) for everything except the regular files. And dropping it there allows to convert all UFS symlinks to {page,simple}_symlink_inode_operations, getting rid of fs/ufs/symlink.c completely. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_inode_get{frag,block}(): get rid of 'phys' argumentAl Viro
Just pass NULL as locked_page in case of first block in the indirect chain. Old calling conventions aside, a reason for having 'phys' was that ufs_inode_getfrag() used to be able to do _two_ allocations - indirect block and extending/reallocating a tail. We needed locked_page for the latter (it's a data), but we also needed to figure out that indirect block is metadata. So we used to pass non-NULL locked_page in all cases *and* used NULL phys as indication of being asked to allocate an indirect. With tail unpacking taken into a separate function we don't need those convolutions anymore. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_getfrag_block(): tidy up a bitAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_inode_getblock(): failure to read an indirect block is -EIOAl Viro
... and not "write to beginning of the disk", TYVM... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_getfrag_block(): turn following indirects into a loopAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_inode_getfrag(): pass index instead of 'fragment'Al Viro
same story as with ufs_inode_getblock() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_inode_getfrag(): split extending the partial blocks offAl Viro
ufs_extend_tail() is handling that now. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_inode_getblock(): pass indirect block number and full indexAl Viro
... instead of messing with buffer_head. We can bloody well do sb_bread() in there. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_inode_getblock(): pass index instead of 'fragment'Al Viro
The value passed to ufs_inode_getblock() as the 3rd argument had lower bits ignored; the upper bits were shifted down and used and they actually make sense - those are _lower_ bits of index in indirect block (i.e. they form the index within a fragment within an indirect block). Pass those as argument. Upper bits of index (i.e. the number of fragment within indirect block) will join them shortly. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_inode_get{frag,block}(): leave sb_getblk() to callerAl Viro
just return the damn block number Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_getfrag_block(): get rid of macro junglesAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_inode_get{frag,block}(): consolidate success exitsAl Viro
These calling conventions are rudiments of pre-2.3 times; they really need to be sanitized. This is the first step; next will be _always_ returning a block number, instead of this "return a pointer to buffer_head, except when we get to the actual data" crap. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs: use the branch depth in ufs_getfrag_block()Al Viro
we'd already calculated it... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs: move calculation of offsets into ufs_getfrag_block()Al Viro
... and massage ufs_frag_map() to take those instead of fragment number. As it is, we duplicate the damn thing on the write side, open-coded and bloody hard to follow. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_inode_get{frag,block}(): get rid of retriesAl Viro
We are holding ->truncate_mutex, so nobody else can alter our block pointers. Rechecks/retries were needed back when we only held BKL there, and had to cope with write_begin/writepage and writepage/truncate races. Can't happen anymore... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06__ufs_truncate_blocks(): avoid excessive dirtying of indirect blocksAl Viro
There's a case when an indirect block gets dirtied for no good reason - when there's a hole starting in the middle of area covered by it and spanning past its end, and truncate() is done precisely to the beginning of the hole. The block is obviously not modified at all - all removals happen beyond it. However, existing code ends up dirtying it just in case. It's trivial to fix and while it's not a real bug by any stretch of imagination, it makes the damn thing harder to follow. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06free_full_branch(): don't bother modifying the block we are going to freeAl Viro
Note that it's already made unreachable from the inode, so we don't have to worry about ufs_frag_map() walking into something already freed. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06move marking inode dirty to the end of __ufs_truncate_blocks()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06free_full_branch(): saner calling conventionsAl Viro
Have caller fetch the block number *and* remove it from wherever it was. Pass the block number instead. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_trunc_branch(): kill recursionAl Viro
turn recursion into a pair of loops Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_trunc_branch(): massage towards killing recursionAl Viro
We always have 0 < depth2 <= depth in there, so if (--depth) { if (--depth2) A B } else { C // not using depth2 } D // not using depth2 is equivalent to if (--depth2) A with s/depth/depth - 1/ if (--depth) B else C D Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06split ufs_truncate_branch() into full- and partial-branch variantsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs: unify the logics for collecting adjacent data blocks to freeAl Viro
open-coded in several places... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_trunc_branch(): separate the calls with non-NULL offsetsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_trunc_branch(): never call with offsets != NULL && depth2 == 0Al Viro
For calls in __ufs_truncate_blocks() it's just a matter of not incrementing offsets[0] and not making that call - immediately following loop will be executed one extra time and we'll be just fine. For recursive call in ufs_trunc_branch() itself, just assing NULL to offsets if we would be about to make such call. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06__ufs_trunc_blocks(): turn the part after switch into a loopAl Viro
... and turn the switch into if (), since all cases with depth != 1 have just become identical. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06__ufs_truncate_blocks(): unify freeing the full branchesAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06unify ufs_trunc_..indirect()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_trunc_..indirect(): more massage towards unifyingAl Viro
Instead of manually checking that the array contains only zeroes, find the position of the last non-zero (in __ufs_truncate(), where we can conveniently do that) and use that to tell if there's any non-zero in the array tail passed to ufs_trunc_...indirect(). The goal of all that clumsiness is to get fold these functions together. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_trunc_...indirect(): pass the array of indices instead of offsetsAl Viro
rather than bitslicing the offset just formed as sum of shifted indices, pass the array of those indices itself. NULL is used as equivalent of "all zeroes" (== free the entire branch). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06__ufs_truncate(); find cutoff distances into branches by offsets[] arrayAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_trunc_dindirect(): pass the number of blocks to keepAl Viro
same as the previous two. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_trunc_indirect(): pass the index of the first pointer to freeAl Viro
... instead of file offset. Same cleanups as in the tindirect conversion in previous commit. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs_trunc_tindirect(): pass the number of blocks to keepAl Viro
IOW, the distance of cutoff from the begining of the branch (in blocks). That (and the fact that block just prior to cutoff is guaranteed to be present) allows to tell whether to free triple indirect block just by looking at the offset. While we are at it, using u64 for index in the block is wrong - those should be unsigned int. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs: beginning of __ufs_truncate_block() massageAl Viro
Use ufs_block_to_path() to find the cutoff path in the block pointers' tree. For now just use the information about the depth (to bypass the fully preserved subtrees); subsequent commits will use the information about actual path. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs: the offsets ufs_block_to_path() puts into array are not sector_tAl Viro
type makes no sense - those are indices in block number arrays, not block numbers. And no, UFS is not likely to grow indirect blocks with 4Gpointers in them... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs: move truncate code into inode.cAl Viro
It is closely tied to block pointers handling there, can benefit from existing helpers, etc. - no point keeping them apart. Trimmed the trailing whitespaces in inode.c at the same time. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs: don't use lock_ufs() for block pointers tree protectionAl Viro
* stores to block pointers are under per-inode seqlock (meta_lock) and mutex (truncate_mutex) * fetches of block pointers are either under truncate_mutex, or wrapped into seqretry loop on meta_lock * all changes of ->i_size are under truncate_mutex and i_mutex * all changes of ->i_lastfrag are under truncate_mutex It's similar to what ext2 is doing; the main difference is that unlike ext2 we can't rely upon the atomicity of stores into block pointers - on UFS2 they are 64bit. So we can't cut the corner when switching a pointer from NULL to non-NULL as we could in ext2_splice_branch() and need to use meta_lock on all modifications. We use seqlock where ext2 uses rwlock; ext2 could probably also benefit from such change... Another non-trivial difference is that with UFS we *cannot* have reader grab truncate_mutex in case of race - it has to keep retrying. That might be possible to change, but not until we lift tail unpacking several levels up in call chain. After that commit we do *NOT* hold fs-wide serialization on accesses to block pointers anymore. Moreover, lock_ufs() can become a normal mutex now - it's only used on statfs, remount and sync_fs and none of those uses are recursive. As the matter of fact, *now* it can be collapsed with ->s_lock, and be eventually replaced with saner per-cylinder-group spinlocks, but that's a separate story. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs: free excessive blocks upon ->write_begin() failure/short copyAl Viro
Broken in "[PATCH] ufs: truncate should allocate block for last byte"; all way back in 2006. ufs_setattr() hadn't been the only user of vmtruncate() and eliminating ->truncate() method required corrections in a bunch of places. Eventually those places had migrated into ->write_begin() failure exit and ->write_end() after short copy... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs: switch ufs_evict_inode() to trimmed-down variant of ufs_truncate()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-07-06ufs: kill more lock_ufs() callsAl Viro
a) move it inside ufs_truncate() b) ufs_free_inode() doesn't need it - it's serialized on ->s_lock c) ufs_write_inode() doesn't need it either (and can be called without it anyway). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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