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2015-03-16udf: use int for allocated blocks instead of sector_tFabian Frederick1-1/+1
Fix the following warnings: fs/udf/balloc.c:768:15: warning: conversion to 'sector_t' from 'int' may change the sign of the result [-Wsign-conversion] allocated = udf_bitmap_prealloc_blocks(sb, ^ fs/udf/balloc.c:773:15: warning: conversion to 'sector_t' from 'int' may change the sign of the result [-Wsign-conversion] allocated = udf_table_prealloc_blocks(sb, ^ fs/udf/balloc.c:778:15: warning: conversion to 'sector_t' from 'int' may change the sign of the result [-Wsign-conversion] allocated = udf_bitmap_prealloc_blocks(sb, ^ fs/udf/balloc.c:783:15: warning: conversion to 'sector_t' from 'int' may change the sign of the result [-Wsign-conversion] allocated = udf_table_prealloc_blocks(sb, ^ fs/udf/balloc.c:791:26: warning: conversion to 'loff_t' from 'sector_t' may change the sign of the result [-Wsign-conversion] inode_add_bytes(inode, allocated << sb->s_blocksize_bits); ^ fs/udf/balloc.c:792:2: warning: conversion to 'int' from 'sector_t' may alter its value [-Wconversion] return allocated; Suggested-by: Jan Kara <[email protected]> Signed-off-by: Fabian Frederick <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2015-03-14udf: remove redundant buffer_head.h includesFabian Frederick11-11/+0
buffer_head.h was already included in udfdecl.h Signed-off-by: Fabian Frederick <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2015-03-14udf: remove else after return in __load_block_bitmap()Fabian Frederick1-8/+7
else after return is not needed. Signed-off-by: Fabian Frederick <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2015-03-14udf: remove unused variable in udf_table_free_blocks()Fabian Frederick1-2/+0
Fix set but not used warning. Signed-off-by: Fabian Frederick <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2015-03-12fs: remove ki_nbytesChristoph Hellwig1-1/+1
There is no need to pass the total request length in the kiocb, as we already get passed in through the iov_iter argument. Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: Al Viro <[email protected]>
2015-02-05udf: remove bool assignment to 0/1Fabian Frederick1-2/+2
Fix the following coccinelle warnings: fs/udf/inode.c:753:2-13: WARNING: Assignment of bool to 0/1 fs/udf/inode.c:795:2-13: WARNING: Assignment of bool to 0/1 Signed-off-by: Fabian Frederick <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2015-02-05udf: use bool for doneFabian Frederick1-2/+2
variable 'done' is only used for true/false in loop. Signed-off-by: Fabian Frederick <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2015-01-30Merge branch 'for_linus' into for_nextJan Kara1-1/+1
2015-01-28udf: Release preallocation on last writeable closeJan Kara1-1/+1
Commit 6fb1ca92a640 "udf: Fix race between write(2) and close(2)" changed the condition when preallocation is released. The idea was that we don't want to release the preallocation for an inode on close when there are other writeable file descriptors for the inode. However the condition was written in the opposite way so we released preallocation only if there were other writeable file descriptors. Fix the problem by changing the condition properly. CC: [email protected] Fixes: 6fb1ca92a6409a9d5b0696447cd4997bc9aaf5a2 Reported-by: Fabian Frederick <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2015-01-12udf: destroy sbi mutex in put_superFabian Frederick1-0/+1
Call mutex_destroy() on superblock mutex in udf_put_super() otherwise mutex debugging code isn't able to detect that mutex is used after being freed. (thanks to Jan Kara for complete definition). Signed-off-by: Fabian Frederick <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2015-01-07udf: Check length of extended attributes and allocation descriptorsJan Kara1-0/+9
Check length of extended attributes and allocation descriptors when loading inodes from disk. Otherwise corrupted filesystems could confuse the code and make the kernel oops. Reported-by: Carl Henrik Lunde <[email protected]> CC: [email protected] Signed-off-by: Jan Kara <[email protected]>
2015-01-07udf: Remove repeated loads blocksizeJan Kara1-11/+8
Store blocksize in a local variable in udf_fill_inode() since it is used a lot of times. Signed-off-by: Jan Kara <[email protected]>
2015-01-05udf: Update Kconfig descriptionJan Kara1-4/+6
Update description of UDF in Kconfig to mention that UDF is also suitable for removable USB disks. Signed-off-by: Jan Kara <[email protected]>
2014-12-21udf: Reduce repeated dereferencesJan Kara2-25/+25
Replace repeated dereferences like dir->i_sb by storing superblock pointer in a variable and using that. Signed-off-by: Jan Kara <[email protected]>
2014-12-21udf: Check component length before reading itJan Kara1-2/+7
Check that length specified in a component of a symlink fits in the input buffer we are reading. Also properly ignore component length for component types that do not use it. Otherwise we read memory after end of buffer for corrupted udf image. Reported-by: Carl Henrik Lunde <[email protected]> CC: [email protected] Signed-off-by: Jan Kara <[email protected]>
2014-12-19udf: Check path length when reading symlinkJan Kara5-20/+48
Symlink reading code does not check whether the resulting path fits into the page provided by the generic code. This isn't as easy as just checking the symlink size because of various encoding conversions we perform on path. So we have to check whether there is still enough space in the buffer on the fly. CC: [email protected] Reported-by: Carl Henrik Lunde <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2014-12-19udf: Verify symlink size before loading itJan Kara1-4/+13
UDF specification allows arbitrarily large symlinks. However we support only symlinks at most one block large. Check the length of the symlink so that we don't access memory beyond end of the symlink block. CC: [email protected] Reported-by: Carl Henrik Lunde <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2014-12-19udf: Verify i_size when loading inodeJan Kara1-0/+14
Verify that inode size is sane when loading inode with data stored in ICB. Otherwise we may get confused later when working with the inode and inode size is too big. CC: [email protected] Reported-by: Carl Henrik Lunde <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2014-11-19udf: One function call less in udf_fill_super() after error detectionMarkus Elfring1-2/+3
The iput() function was called in up to three cases by the udf_fill_super() function during error handling even if the passed data structure element contained still a null pointer. This implementation detail could be improved by the introduction of another jump label. Signed-off-by: Markus Elfring <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2014-11-19udf: Deletion of unnecessary checks before the function call "iput"Markus Elfring1-4/+2
The iput() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2014-10-09udf: Fix loading of special inodesJan Kara3-11/+26
Some UDF media have special inodes (like VAT or metadata partition inodes) whose link_count is 0. Thus commit 4071b9136223 (udf: Properly detect stale inodes) broke loading these inodes because udf_iget() started returning -ESTALE for them. Since we still need to properly detect stale inodes queried by NFS, create two variants of udf_iget() - one which is used for looking up special inodes (which ignores link_count == 0) and one which is used for other cases which return ESTALE when link_count == 0. Fixes: 4071b913622316970d0e1919f7d82b4403fec5f2 CC: [email protected] Signed-off-by: Jan Kara <[email protected]>
2014-09-29udf: remove redundant sys_tz declarationFabian Frederick1-2/+0
sys_tz is already declared in include/linux/time.h Cc: Jan Kara <[email protected]> Signed-off-by: Fabian Frederick <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2014-09-17udf: Fix race between write(2) and close(2)Jan Kara1-1/+8
Currently write(2) updating i_size and close(2) of the file can race in such a way that udf_truncate_tail_extent() called from udf_file_release() sees old i_size but already new extents added by the running write call. This results in complaints like: UDF-fs: warning (device vdb2): udf_truncate_tail_extent: Too long extent after EOF in inode 877: i_size: 0 lbcount: 1073739776 extent 0+1073739776 UDF-fs: error (device vdb2): udf_truncate_tail_extent: Extent after EOF in inode 877 Fix the problem by grabbing i_mutex in udf_file_release() to be sure i_size is consistent with current state of extent list. Also avoid truncating tail extent unnecessarily when the file is still open for writing. Signed-off-by: Jan Kara <[email protected]>
2014-09-04udf: saner calling conventions for udf_new_inode()Al Viro3-43/+27
Signed-off-by: Al Viro <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2014-09-04udf: fix the udf_iget() vs. udf_new_inode() racesAl Viro2-1/+13
Currently udf_iget() (triggered by NFS) can race with udf_new_inode() leading to two inode structures with the same inode number: nfsd: iget_locked() creates inode nfsd: try to read from disk, block on that. udf_new_inode(): allocate inode with that inumber udf_new_inode(): insert it into icache, set it up and dirty udf_write_inode(): write inode into buffer cache nfsd: get CPU again, look into buffer cache, see nice and sane on-disk inode, set the in-core inode from it Fix the problem by putting inode into icache in locked state (I_NEW set) and unlocking it only after it's fully set up. Signed-off-by: Al Viro <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2014-09-04udf: merge the pieces inserting a new non-directory object into directoryAl Viro1-69/+29
boilerplate code in udf_{create,mknod,symlink} taken to new helper symlink case converted to unique id calculated by udf_new_inode() - no point finding a new one. Signed-off-by: Al Viro <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2014-09-04udf: Set i_generation fieldJan Kara2-0/+2
Currently UDF doesn't initialize i_generation in any way and thus NFS can easily get reallocated inodes from stale file handles. Luckily UDF already has a unique object identifier associated with each inode - i_unique. Use that for initialization of i_generation. Signed-off-by: Jan Kara <[email protected]>
2014-09-04udf: Properly detect stale inodesJan Kara1-2/+4
NFS can easily ask for inodes that are already deleted. Currently UDF happily returns such inodes which is a bug. Return -ESTALE if udf_read_inode() is asked to read deleted inode. Signed-off-by: Jan Kara <[email protected]>
2014-09-04udf: Make udf_read_inode() and udf_iget() return errorJan Kara4-95/+96
Currently __udf_read_inode() wasn't returning anything and we found out whether we succeeded reading inode by checking whether inode is bad or not. udf_iget() returned NULL on failure and inode pointer otherwise. Make these two functions properly propagate errors up the call stack and use the return value in callers. Signed-off-by: Jan Kara <[email protected]>
2014-09-04udf: Avoid infinite loop when processing indirect ICBsJan Kara1-14/+21
We did not implement any bound on number of indirect ICBs we follow when loading inode. Thus corrupted medium could cause kernel to go into an infinite loop, possibly causing a stack overflow. Fix the possible stack overflow by removing recursion from __udf_read_inode() and limit number of indirect ICBs we follow to avoid infinite loops. Signed-off-by: Jan Kara <[email protected]>
2014-09-04udf: Fold udf_fill_inode() into __udf_read_inode()Jan Kara1-17/+5
There's no good reason to separate these since udf_fill_inode() is called only from __udf_read_inode() and both do part of the same thing. Signed-off-by: Jan Kara <[email protected]>
2014-09-04udf: Avoid dir link count to go negativeJan Kara1-1/+1
If we are writing back inode of unlinked directory, its link count ends up being (u16)-1. Although the inode is deleted, udf_iget() can load the inode when NFS uses stale file handle and get confused. Signed-off-by: Jan Kara <[email protected]>
2014-08-19udf: avoid unneeded up_write when fail to add entry in ->symlinkChao Yu1-1/+2
We have released the ->i_data_sem before invoking udf_add_entry(), so in following error path, we should not release this lock again. Signed-off-by: Chao Yu <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2014-07-15udf: avoid redundant memcpy when writing data in ICBChao Yu1-19/+1
Valid data within i_size in page cache will be copied to ICB cache when we writeback the page by invoking udf_adinicb_writepage, so the copy in udf_adinicb_write_end is redundant. After we remove the copy, it's better to use simple_write_end directly in udf_adinicb_aops instead of udf_adinicb_write_end. Signed-off-by: Chao Yu <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2014-07-15fs/udf: re-use hex_asc_upper_{hi,lo} macrosAndy Shevchenko1-5/+4
This patch cleans up udf_translate_to_linux() a bit by using globally defined macros instead of custom code. We can use sprintf(buf, "%04X", ...) there as well, but this one faster. Signed-off-by: Andy Shevchenko <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2014-07-15udf: use linux/uaccess.hFabian Frederick4-4/+4
Fix checkpatch warning WARNING: Use #include <linux/uaccess.h> instead of <asm/uaccess.h> Cc: Jan Kara <[email protected]> Signed-off-by: Fabian Frederick <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2014-05-06udf: switch to ->write_iter()Al Viro1-6/+5
Signed-off-by: Al Viro <[email protected]>
2014-05-06switch simple generic_file_aio_read() users to ->read_iter()Al Viro1-2/+2
Signed-off-by: Al Viro <[email protected]>
2014-05-06switch {__,}blockdev_direct_IO() to iov_iterAl Viro1-2/+1
Signed-off-by: Al Viro <[email protected]>
2014-05-06get rid of pointless iov_length() in ->direct_IO()Al Viro1-1/+2
all callers have iov_length(iter->iov, iter->nr_segs) == iov_iter_count(iter) Signed-off-by: Al Viro <[email protected]>
2014-05-06pass iov_iter to ->direct_IO()Al Viro2-6/+6
unmodified, for now Signed-off-by: Al Viro <[email protected]>
2014-04-12Merge branch 'for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs updates from Al Viro: "The first vfs pile, with deep apologies for being very late in this window. Assorted cleanups and fixes, plus a large preparatory part of iov_iter work. There's a lot more of that, but it'll probably go into the next merge window - it *does* shape up nicely, removes a lot of boilerplate, gets rid of locking inconsistencie between aio_write and splice_write and I hope to get Kent's direct-io rewrite merged into the same queue, but some of the stuff after this point is having (mostly trivial) conflicts with the things already merged into mainline and with some I want more testing. This one passes LTP and xfstests without regressions, in addition to usual beating. BTW, readahead02 in ltp syscalls testsuite has started giving failures since "mm/readahead.c: fix readahead failure for memoryless NUMA nodes and limit readahead pages" - might be a false positive, might be a real regression..." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits) missing bits of "splice: fix racy pipe->buffers uses" cifs: fix the race in cifs_writev() ceph_sync_{,direct_}write: fix an oops on ceph_osdc_new_request() failure kill generic_file_buffered_write() ocfs2_file_aio_write(): switch to generic_perform_write() ceph_aio_write(): switch to generic_perform_write() xfs_file_buffered_aio_write(): switch to generic_perform_write() export generic_perform_write(), start getting rid of generic_file_buffer_write() generic_file_direct_write(): get rid of ppos argument btrfs_file_aio_write(): get rid of ppos kill the 5th argument of generic_file_buffered_write() kill the 4th argument of __generic_file_aio_write() lustre: don't open-code kernel_recvmsg() ocfs2: don't open-code kernel_recvmsg() drbd: don't open-code kernel_recvmsg() constify blk_rq_map_user_iov() and friends lustre: switch to kernel_sendmsg() ocfs2: don't open-code kernel_sendmsg() take iov_iter stuff to mm/iov_iter.c process_vm_access: tidy up a bit ...
2014-04-07Merge branch 'for_linus' of ↵Linus Torvalds1-2/+6
git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs Pull ext3 improvements, cleanups, reiserfs fix from Jan Kara: "various cleanups for ext2, ext3, udf, isofs, a documentation update for quota, and a fix of a race in reiserfs readdir implementation" * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: reiserfs: fix race in readdir ext2: acl: remove unneeded include of linux/capability.h ext3: explicitly remove inode from orphan list after failed direct io fs/isofs/inode.c add __init to init_inodecache() ext3: Speedup WB_SYNC_ALL pass fs/quota/Kconfig: Update filesystems ext3: Update outdated comment before ext3_ordered_writepage() ext3: Update PF_MEMALLOC handling in ext3_write_inode() ext2/3: use prandom_u32() instead of get_random_bytes() ext3: remove an unneeded check in ext3_new_blocks() ext3: remove unneeded check in ext3_ordered_writepage() fs: Mark function as static in ext3/xattr_security.c fs: Mark function as static in ext3/dir.c fs: Mark function as static in ext2/xattr_security.c ext3: Add __init macro to init_inodecache ext2: Add __init macro to init_inodecache udf: Add __init macro to init_inodecache fs: udf: parse_options: blocksize check
2014-04-04Merge tag 'ext4_for_linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 updates from Ted Ts'o: "Major changes for 3.14 include support for the newly added ZERO_RANGE and COLLAPSE_RANGE fallocate operations, and scalability improvements in the jbd2 layer and in xattr handling when the extended attributes spill over into an external block. Other than that, the usual clean ups and minor bug fixes" * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (42 commits) ext4: fix premature freeing of partial clusters split across leaf blocks ext4: remove unneeded test of ret variable ext4: fix comment typo ext4: make ext4_block_zero_page_range static ext4: atomically set inode->i_flags in ext4_set_inode_flags() ext4: optimize Hurd tests when reading/writing inodes ext4: kill i_version support for Hurd-castrated file systems ext4: each filesystem creates and uses its own mb_cache fs/mbcache.c: doucple the locking of local from global data fs/mbcache.c: change block and index hash chain to hlist_bl_node ext4: Introduce FALLOC_FL_ZERO_RANGE flag for fallocate ext4: refactor ext4_fallocate code ext4: Update inode i_size after the preallocation ext4: fix partial cluster handling for bigalloc file systems ext4: delete path dealloc code in ext4_ext_handle_uninitialized_extents ext4: only call sync_filesystm() when remounting read-only fs: push sync_filesystem() down to the file system's remount_fs() jbd2: improve error messages for inconsistent journal heads jbd2: minimize region locked by j_list_lock in jbd2_journal_forget() jbd2: minimize region locked by j_list_lock in journal_get_create_access() ...
2014-04-03mm + fs: store shadow entries in page cacheJohannes Weiner1-2/+2
Reclaim will be leaving shadow entries in the page cache radix tree upon evicting the real page. As those pages are found from the LRU, an iput() can lead to the inode being freed concurrently. At this point, reclaim must no longer install shadow pages because the inode freeing code needs to ensure the page tree is really empty. Add an address_space flag, AS_EXITING, that the inode freeing code sets under the tree lock before doing the final truncate. Reclaim will check for this flag before installing shadow pages. Signed-off-by: Johannes Weiner <[email protected]> Reviewed-by: Rik van Riel <[email protected]> Reviewed-by: Minchan Kim <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: Bob Liu <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Dave Chinner <[email protected]> Cc: Greg Thelen <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Jan Kara <[email protected]> Cc: KOSAKI Motohiro <[email protected]> Cc: Luigi Semenzato <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Metin Doslu <[email protected]> Cc: Michel Lespinasse <[email protected]> Cc: Ozgun Erdogan <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Roman Gushchin <[email protected]> Cc: Ryan Mallon <[email protected]> Cc: Tejun Heo <[email protected]> Cc: Vlastimil Babka <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2014-04-01kill the 4th argument of __generic_file_aio_write()Al Viro1-1/+1
It's always equal to &iocb->ki_pos, where iocb is the value of the 1st argument. Signed-off-by: Al Viro <[email protected]>
2014-03-13fs: push sync_filesystem() down to the file system's remount_fs()Theodore Ts'o1-0/+1
Previously, the no-op "mount -o mount /dev/xxx" operation when the file system is already mounted read-write causes an implied, unconditional syncfs(). This seems pretty stupid, and it's certainly documented or guaraunteed to do this, nor is it particularly useful, except in the case where the file system was mounted rw and is getting remounted read-only. However, it's possible that there might be some file systems that are actually depending on this behavior. In most file systems, it's probably fine to only call sync_filesystem() when transitioning from read-write to read-only, and there are some file systems where this is not needed at all (for example, for a pseudo-filesystem or something like romfs). Signed-off-by: "Theodore Ts'o" <[email protected]> Cc: [email protected] Cc: Christoph Hellwig <[email protected]> Cc: Artem Bityutskiy <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Evgeniy Dushistov <[email protected]> Cc: Jan Kara <[email protected]> Cc: OGAWA Hirofumi <[email protected]> Cc: Anders Larsen <[email protected]> Cc: Phillip Lougher <[email protected]> Cc: Kees Cook <[email protected]> Cc: Mikulas Patocka <[email protected]> Cc: Petr Vandrovec <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected]
2014-03-03udf: Add __init macro to init_inodecacheFabian Frederick1-1/+1
init_inodecache is only called by __init init_udf_fs. Signed-off-by: Fabian Frederick <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2014-03-03fs: udf: parse_options: blocksize checkFabian Frederick1-1/+5
Both affs and isofs check for blocksize integrity during parse_options.Do the same thing for udf. Valid values : 512, 1024, 2048 or 4096 bytes. Signed-off-by: Fabian Frederick <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2014-02-20udf: Fix data corruption on file type conversionJan Kara2-2/+13
UDF has two types of files - files with data stored in inode (ICB in UDF terminology) and files with data stored in external data blocks. We convert file from in-inode format to external format in udf_file_aio_write() when we find out data won't fit into inode any longer. However the following race between two O_APPEND writes can happen: CPU1 CPU2 udf_file_aio_write() udf_file_aio_write() down_write(&iinfo->i_data_sem); checks that i_size + count1 fits within inode => no need to convert up_write(&iinfo->i_data_sem); down_write(&iinfo->i_data_sem); checks that i_size + count2 fits within inode => no need to convert up_write(&iinfo->i_data_sem); generic_file_aio_write() - extends file by count1 bytes generic_file_aio_write() - extends file by count2 bytes Clearly if count1 + count2 doesn't fit into the inode, we overwrite kernel buffers beyond inode, possibly corrupting the filesystem as well. Fix the problem by acquiring i_mutex before checking whether write fits into the inode and using __generic_file_aio_write() afterwards which puts check and write into one critical section. Reported-by: Al Viro <[email protected]> Signed-off-by: Jan Kara <[email protected]>
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