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2018-04-24ubifs: Check ubifs_wbuf_sync() return codeRichard Weinberger
commit aac17948a7ce01fb60b9ee6cf902967a47b3ce26 upstream. If ubifs_wbuf_sync() fails we must not write a master node with the dirty marker cleared. Otherwise it is possible that in case of an IO error while syncing we mark the filesystem as clean and UBIFS refuses to recover upon next mount. Cc: <stable@vger.kernel.org> Fixes: 1e51764a3c2a ("UBIFS: add new flash file system") Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-02-17ubifs: Massage assert in ubifs_xattr_set() wrt. init_xattrsXiaolei Li
commit d8db5b1ca9d4c57e49893d0f78e6d5ce81450cc8 upstream. The inode is not locked in init_xattrs when creating a new inode. Without this patch, there will occurs assert when booting or creating a new file, if the kernel config CONFIG_SECURITY_SMACK is enabled. Log likes: UBIFS assert failed in ubifs_xattr_set at 298 (pid 1156) CPU: 1 PID: 1156 Comm: ldconfig Tainted: G S 4.12.0-rc1-207440-g1e70b02 #2 Hardware name: MediaTek MT2712 evaluation board (DT) Call trace: [<ffff000008088538>] dump_backtrace+0x0/0x238 [<ffff000008088834>] show_stack+0x14/0x20 [<ffff0000083d98d4>] dump_stack+0x9c/0xc0 [<ffff00000835d524>] ubifs_xattr_set+0x374/0x5e0 [<ffff00000835d7ec>] init_xattrs+0x5c/0xb8 [<ffff000008385788>] security_inode_init_security+0x110/0x190 [<ffff00000835e058>] ubifs_init_security+0x30/0x68 [<ffff00000833ada0>] ubifs_mkdir+0x100/0x200 [<ffff00000820669c>] vfs_mkdir+0x11c/0x1b8 [<ffff00000820b73c>] SyS_mkdirat+0x74/0xd0 [<ffff000008082f8c>] __sys_trace_return+0x0/0x4 Signed-off-by: Xiaolei Li <xiaolei.li@mediatek.com> Signed-off-by: Richard Weinberger <richard@nod.at> Cc: stable@vger.kernel.org (julia: massaged to apply to 4.9.y, which doesn't contain fscrypto support) Signed-off-by: Julia Cartwright <julia@ni.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-07-27ubifs: Don't leak kernel memory to the MTDRichard Weinberger
commit 4acadda74ff8b949c448c0282765ae747e088c87 upstream. When UBIFS prepares data structures which will be written to the MTD it ensues that their lengths are multiple of 8. Since it uses kmalloc() the padded bytes are left uninitialized and we leak a few bytes of kernel memory to the MTD. To make sure that all bytes are initialized, let's switch to kzalloc(). Kzalloc() is fine in this case because the buffers are not huge and in the IO path the performance bottleneck is anyway the MTD. Fixes: 1e51764a3c2a ("UBIFS: add new flash file system") Signed-off-by: Richard Weinberger <richard@nod.at> Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-27ubifs: Fix O_TMPFILE corner case in ubifs_link()Richard Weinberger
commit 32fe905c17f001c0eee13c59afddd0bf2eed509c upstream. It is perfectly fine to link a tmpfile back using linkat(). Since tmpfiles are created with a link count of 0 they appear on the orphan list, upon re-linking the inode has to be removed from the orphan list again. Ralph faced a filesystem corruption in combination with overlayfs due to this bug. Cc: Ralph Sennhauser <ralph.sennhauser@gmail.com> Cc: Amir Goldstein <amir73il@gmail.com> Reported-by: Ralph Sennhauser <ralph.sennhauser@gmail.com> Tested-by: Ralph Sennhauser <ralph.sennhauser@gmail.com> Reported-by: Amir Goldstein <amir73il@gmail.com> Fixes: 474b93704f321 ("ubifs: Implement O_TMPFILE") Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-27ubifs: Fix RENAME_WHITEOUT supportFelix Fietkau
commit c3d9fda688742c06e89aa1f0f8fd943fc11468cb upstream. Remove faulty leftover check in do_rename(), apparently introduced in a merge that combined whiteout support changes with commit f03b8ad8d386 ("fs: support RENAME_NOREPLACE for local filesystems") Fixes: f03b8ad8d386 ("fs: support RENAME_NOREPLACE for local filesystems") Fixes: 9e0a1fff8db5 ("ubifs: Implement RENAME_WHITEOUT") Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-01-26ubifs: Fix journal replay wrt. xattr nodesRichard Weinberger
commit 1cb51a15b576ee325d527726afff40947218fd5e upstream. When replaying the journal it can happen that a journal entry points to a garbage collected node. This is the case when a power-cut occurred between a garbage collect run and a commit. In such a case nodes have to be read using the failable read functions to detect whether the found node matches what we expect. One corner case was forgotten, when the journal contains an entry to remove an inode all xattrs have to be removed too. UBIFS models xattr like directory entries, so the TNC code iterates over all xattrs of the inode and removes them too. This code re-uses the functions for walking directories and calls ubifs_tnc_next_ent(). ubifs_tnc_next_ent() expects to be used only after the journal and aborts when a node does not match the expected result. This behavior can render an UBIFS volume unmountable after a power-cut when xattrs are used. Fix this issue by using failable read functions in ubifs_tnc_next_ent() too when replaying the journal. Fixes: 1e51764a3c2ac05a ("UBIFS: add new flash file system") Reported-by: Rock Lee <rockdotlee@gmail.com> Reviewed-by: David Gstir <david@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-28ubifs: Fix regression in ubifs_readdir()Richard Weinberger
Commit c83ed4c9dbb35 ("ubifs: Abort readdir upon error") broke overlayfs support because the fix exposed an internal error code to VFS. Reported-by: Peter Rosin <peda@axentia.se> Tested-by: Peter Rosin <peda@axentia.se> Reported-by: Ralph Sennhauser <ralph.sennhauser@gmail.com> Tested-by: Ralph Sennhauser <ralph.sennhauser@gmail.com> Fixes: c83ed4c9dbb35 ("ubifs: Abort readdir upon error") Cc: stable@vger.kernel.org Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-20ubifs: Abort readdir upon errorRichard Weinberger
If UBIFS is facing an error while walking a directory, it reports this error and ubifs_readdir() returns the error code. But the VFS readdir logic does not make the getdents system call fail in all cases. When the readdir cursor indicates that more entries are present, the system call will just return and the libc wrapper will try again since it also knows that more entries are present. This causes the libc wrapper to busy loop for ever when a directory is corrupted on UBIFS. A common approach do deal with corrupted directory entries is skipping them by setting the cursor to the next entry. On UBIFS this approach is not possible since we cannot compute the next directory entry cursor position without reading the current entry. So all we can do is setting the cursor to the "no more entries" position and make getdents exit. Cc: stable@vger.kernel.org Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-20ubifs: Fix xattr_names length in exit pathsRichard Weinberger
When the operation fails we also have to undo the changes we made to ->xattr_names. Otherwise listxattr() will report wrong lengths. Cc: stable@vger.kernel.org Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-20ubifs: Rename ubifs_rename2Richard Weinberger
Since ->rename2 is gone, rename ubifs_rename2() to ubifs_rename(). Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-11Merge tag 'upstream-4.9-rc1' of git://git.infradead.org/linux-ubifsLinus Torvalds
Pull UBI/UBIFS updates from Richard Weinberger: "This pull request contains: - Fixes for both UBI and UBIFS - overlayfs support (O_TMPFILE, RENAME_WHITEOUT/EXCHANGE) - Code refactoring for the upcoming MLC support" [ Ugh, we just got rid of the "rename2()" naming for the extended rename functionality. And this re-introduces it in ubifs with the cross- renaming and whiteout support. But rather than do any re-organizations in the merge itself, the naming can be cleaned up later ] * tag 'upstream-4.9-rc1' of git://git.infradead.org/linux-ubifs: (27 commits) UBIFS: improve function-level documentation ubifs: fix host xattr_len when changing xattr ubifs: Use move variable in ubifs_rename() ubifs: Implement RENAME_EXCHANGE ubifs: Implement RENAME_WHITEOUT ubifs: Implement O_TMPFILE ubi: Fix Fastmap's update_vol() ubi: Fix races around ubi_refill_pools() ubi: Deal with interrupted erasures in WL UBI: introduce the VID buffer concept UBI: hide EBA internals UBI: provide an helper to query LEB information UBI: provide an helper to check whether a LEB is mapped or not UBI: add an helper to check lnum validity UBI: simplify LEB write and atomic LEB change code UBI: simplify recover_peb() code UBI: move the global ech and vidh variables into struct ubi_attach_info UBI: provide helpers to allocate and free aeb elements UBI: fastmap: use ubi_io_{read, write}_data() instead of ubi_io_{read, write}() UBI: fastmap: use ubi_rb_for_each_entry() in unmap_peb() ...
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
2016-10-10Merge branch 'work.xattr' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs xattr updates from Al Viro: "xattr stuff from Andreas This completes the switch to xattr_handler ->get()/->set() from ->getxattr/->setxattr/->removexattr" * 'work.xattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: vfs: Remove {get,set,remove}xattr inode operations xattr: Stop calling {get,set,remove}xattr inode operations vfs: Check for the IOP_XATTR flag in listxattr xattr: Add __vfs_{get,set,remove}xattr helpers libfs: Use IOP_XATTR flag for empty directory handling vfs: Use IOP_XATTR flag for bad-inode handling vfs: Add IOP_XATTR inode operations flag vfs: Move xattr_resolve_name to the front of fs/xattr.c ecryptfs: Switch to generic xattr handlers sockfs: Get rid of getxattr iop sockfs: getxattr: Fail with -EOPNOTSUPP for invalid attribute names kernfs: Switch to generic xattr handlers hfs: Switch to generic xattr handlers jffs2: Remove jffs2_{get,set,remove}xattr macros xattr: Remove unnecessary NULL attribute name check
2016-10-08Merge remote-tracking branch 'jk/vfs' into work.miscAl Viro
2016-10-07vfs: Remove {get,set,remove}xattr inode operationsAndreas Gruenbacher
These inode operations are no longer used; remove them. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-10-02UBIFS: improve function-level documentationJulia Lawall
Fix various inconsistencies in the documentation associated with various functions. In the case of fs/ubifs/lprops.c, the second parameter of ubifs_get_lp_stats was renamed from st to lst in commit 84abf972ccff ("UBIFS: add re-mount debugging checks") In the case of fs/ubifs/lpt_commit.c, the excess variables have never existed in the associated functions since the code was introduced into the kernel. The others appear to be straightforward typos. Issues detected using Coccinelle (http://coccinelle.lip6.fr/) Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02ubifs: fix host xattr_len when changing xattrPascal Eberhard
When an extended attribute is changed, xattr_len of host inode is recalculated. ui->data_len is updated before computation and result is wrong. This patch adds a temporary variable to fix computation. To reproduce the issue: ~# > a.txt ~# attr -s an-attr -V a-value a.txt ~# attr -s an-attr -V a-bit-bigger-value a.txt Now host inode xattr_len is wrong. Forcing dbg_check_filesystem() generates the following error: [ 130.620140] UBIFS (ubi0:2): background thread "ubifs_bgt0_2" started, PID 565 [ 131.470790] UBIFS error (ubi0:2 pid 564): check_inodes: inode 646 has xattr size 240, but calculated size is 256 [ 131.481697] UBIFS (ubi0:2): dump of the inode 646 sitting in LEB 29:114688 [ 131.488953] magic 0x6101831 [ 131.492876] crc 0x9fce9091 [ 131.496836] node_type 0 (inode node) [ 131.501193] group_type 1 (in node group) [ 131.505788] sqnum 9278 [ 131.509191] len 160 [ 131.512549] key (646, inode) [ 131.516688] creat_sqnum 9270 [ 131.520133] size 0 [ 131.523264] nlink 1 [ 131.526398] atime 1053025857.0 [ 131.530574] mtime 1053025857.0 [ 131.534714] ctime 1053025906.0 [ 131.538849] uid 0 [ 131.542009] gid 0 [ 131.545140] mode 33188 [ 131.548636] flags 0x1 [ 131.551977] xattr_cnt 1 [ 131.555108] xattr_size 240 [ 131.558420] xattr_names 12 [ 131.561670] compr_type 0x1 [ 131.564983] data len 0 [ 131.568125] UBIFS error (ubi0:2 pid 564): dbg_check_filesystem: file-system check failed with error -22 [ 131.578074] CPU: 0 PID: 564 Comm: mount Not tainted 4.4.12-g3639bea54a #24 [ 131.585352] Hardware name: Generic AM33XX (Flattened Device Tree) [ 131.591918] [<c00151c0>] (unwind_backtrace) from [<c0012acc>] (show_stack+0x10/0x14) [ 131.600177] [<c0012acc>] (show_stack) from [<c01c950c>] (dbg_check_filesystem+0x464/0x4d0) [ 131.608934] [<c01c950c>] (dbg_check_filesystem) from [<c019f36c>] (ubifs_mount+0x14f8/0x2130) [ 131.617991] [<c019f36c>] (ubifs_mount) from [<c00d7088>] (mount_fs+0x14/0x98) [ 131.625572] [<c00d7088>] (mount_fs) from [<c00ed674>] (vfs_kern_mount+0x4c/0xd4) [ 131.633435] [<c00ed674>] (vfs_kern_mount) from [<c00efb5c>] (do_mount+0x988/0xb50) [ 131.641471] [<c00efb5c>] (do_mount) from [<c00f004c>] (SyS_mount+0x74/0xa0) [ 131.648837] [<c00f004c>] (SyS_mount) from [<c000fe20>] (ret_fast_syscall+0x0/0x3c) [ 131.665315] UBIFS (ubi0:2): background thread "ubifs_bgt0_2" stops Signed-off-by: Pascal Eberhard <pascal.eberhard@gmail.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02ubifs: Use move variable in ubifs_rename()Richard Weinberger
...to make the code more consistent since we use move already in other places. Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02ubifs: Implement RENAME_EXCHANGERichard Weinberger
Adds RENAME_EXCHANGE to UBIFS, the operation itself is completely disjunct from a regular rename() that's why we dispatch very early in ubifs_reaname(). RENAME_EXCHANGE used by the renameat2() system call allows the caller to exchange two paths atomically. Both paths have to exist and have to be on the same filesystem. Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02ubifs: Implement RENAME_WHITEOUTRichard Weinberger
Adds RENAME_WHITEOUT support to UBIFS, we implement it in the same way as ext4 and xfs do. For an overview of other ways to implement it please refere to commit 7dcf5c3e4527 ("xfs: add RENAME_WHITEOUT support"). Signed-off-by: Richard Weinberger <richard@nod.at>
2016-10-02ubifs: Implement O_TMPFILERichard Weinberger
This patchs adds O_TMPFILE support to UBIFS. A temp file is a reference to an unlinked inode, a user holding the reference can use it. As soon it is being closed all data vanishes. Signed-off-by: Richard Weinberger <richard@nod.at>
2016-09-27fs: rename "rename2" i_op to "rename"Miklos Szeredi
Generated patch: sed -i "s/\.rename2\t/\.rename\t\t/" `git grep -wl rename2` sed -i "s/\brename2\b/rename/g" `git grep -wl rename2` Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-09-27fs: support RENAME_NOREPLACE for local filesystemsMiklos Szeredi
This is trivial to do: - add flags argument to foo_rename() - check if flags doesn't have any other than RENAME_NOREPLACE - assign foo_rename() to .rename2 instead of .rename Filesystems converted: affs, bfs, exofs, ext2, hfs, hfsplus, jffs2, jfs, logfs, minix, msdos, nilfs2, omfs, reiserfs, sysvfs, ubifs, udf, ufs, vfat. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Acked-by: Boaz Harrosh <ooo@electrozaur.com> Acked-by: Richard Weinberger <richard@nod.at> Acked-by: Bob Copeland <me@bobcopeland.com> Acked-by: Jan Kara <jack@suse.cz> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Jaegeuk Kim <jaegeuk@kernel.org> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: Mikulas Patocka <mpatocka@redhat.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Dave Kleikamp <shaggy@kernel.org> Cc: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Christoph Hellwig <hch@infradead.org>
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>
2016-08-23ubifs: Fix xattr generic handler usageRichard Weinberger
UBIFS uses full names to work with xattrs, therefore we have to use xattr_full_name() to obtain the xattr prefix as string. Cc: <stable@vger.kernel.org> Cc: Andreas Gruenbacher <agruenba@redhat.com> Fixes: 2b88fc21ca ("ubifs: Switch to generic xattr handlers") Signed-off-by: Richard Weinberger <richard@nod.at> Reviewed-by: Andreas Gruenbacher <agruenba@redhat.com> Tested-by: Dongsheng Yang <dongsheng081251@gmail.com>
2016-08-23ubifs: Fix assertion in layout_in_gaps()Vincent Stehlé
An assertion in layout_in_gaps() verifies that the gap_lebs pointer is below the maximum bound. When computing this maximum bound the idx_lebs count is multiplied by sizeof(int), while C pointers arithmetic does take into account the size of the pointed elements implicitly already. Remove the multiplication to fix the assertion. Fixes: 1e51764a3c2ac05a ("UBIFS: add new flash file system") Cc: <stable@vger.kernel.org> Signed-off-by: Vincent Stehlé <vincent.stehle@intel.com> Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-07-29ubifs: switch_gc_head: Remove redondant sync of wbufSylvain Etienne
The wbuf is already sync-ed before ubifs_leb_unmap() Signed-off-by: Sylvain Etienne <seti@dadboo.eu> Acked-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-07-29ubifs: Silence early error messages if MS_SILENT is setDaniel Golle
Probe-mounting a volume too small for UBIFS results in kernel log polution which might irritate users. Address this by silencing errors which may happen during boot if the rootfs is e.g. squashfs (and thus rather small) stored on a UBI volume. Signed-off-by: Daniel Golle <daniel@makrotopia.org> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-07-29ubifs: Update comment for ubifs_errcDaniel Golle
Signed-off-by: Daniel Golle <daniel@makrotopia.org> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-07-29ubifs: Make xattr structures staticBen Dooks
Fix sparse warnings from the use of "struct xattr_handler" structures that are not exported by making them static. Fixes the following sparse warnings: /fs/ubifs/xattr.c:595:28: warning: symbol 'ubifs_user_xattr_handler' was not declared. Should it be static? /fs/ubifs/xattr.c:601:28: warning: symbol 'ubifs_trusted_xattr_handler' was not declared. Should it be static? /fs/ubifs/xattr.c:607:28: warning: symbol 'ubifs_security_xattr_handler' was not declared. Should it be static? Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-07-29ubifs: Silence error output if MS_SILENT is setDaniel Golle
This change completes commit 90bea5a3f0 ("UBIFS: respect MS_SILENT mount flag") which already implements support for MS_SILENT except for that one error message which is still being displayed despite MS_SILENT being set. Suppress that error message as well in case MS_SILENT is set. Signed-off-by: Daniel Golle <daniel@makrotopia.org> [rw: massaged commit message] Signed-off-by: Richard Weinberger <richard@nod.at>
2016-06-23UBIFS: Implement ->migratepage()Kirill A. Shutemov
During page migrations UBIFS might get confused and the following assert triggers: [ 213.480000] UBIFS assert failed in ubifs_set_page_dirty at 1451 (pid 436) [ 213.490000] CPU: 0 PID: 436 Comm: drm-stress-test Not tainted 4.4.4-00176-geaa802524636-dirty #1008 [ 213.490000] Hardware name: Allwinner sun4i/sun5i Families [ 213.490000] [<c0015e70>] (unwind_backtrace) from [<c0012cdc>] (show_stack+0x10/0x14) [ 213.490000] [<c0012cdc>] (show_stack) from [<c02ad834>] (dump_stack+0x8c/0xa0) [ 213.490000] [<c02ad834>] (dump_stack) from [<c0236ee8>] (ubifs_set_page_dirty+0x44/0x50) [ 213.490000] [<c0236ee8>] (ubifs_set_page_dirty) from [<c00fa0bc>] (try_to_unmap_one+0x10c/0x3a8) [ 213.490000] [<c00fa0bc>] (try_to_unmap_one) from [<c00fadb4>] (rmap_walk+0xb4/0x290) [ 213.490000] [<c00fadb4>] (rmap_walk) from [<c00fb1bc>] (try_to_unmap+0x64/0x80) [ 213.490000] [<c00fb1bc>] (try_to_unmap) from [<c010dc28>] (migrate_pages+0x328/0x7a0) [ 213.490000] [<c010dc28>] (migrate_pages) from [<c00d0cb0>] (alloc_contig_range+0x168/0x2f4) [ 213.490000] [<c00d0cb0>] (alloc_contig_range) from [<c010ec00>] (cma_alloc+0x170/0x2c0) [ 213.490000] [<c010ec00>] (cma_alloc) from [<c001a958>] (__alloc_from_contiguous+0x38/0xd8) [ 213.490000] [<c001a958>] (__alloc_from_contiguous) from [<c001ad44>] (__dma_alloc+0x23c/0x274) [ 213.490000] [<c001ad44>] (__dma_alloc) from [<c001ae08>] (arm_dma_alloc+0x54/0x5c) [ 213.490000] [<c001ae08>] (arm_dma_alloc) from [<c035cecc>] (drm_gem_cma_create+0xb8/0xf0) [ 213.490000] [<c035cecc>] (drm_gem_cma_create) from [<c035cf20>] (drm_gem_cma_create_with_handle+0x1c/0xe8) [ 213.490000] [<c035cf20>] (drm_gem_cma_create_with_handle) from [<c035d088>] (drm_gem_cma_dumb_create+0x3c/0x48) [ 213.490000] [<c035d088>] (drm_gem_cma_dumb_create) from [<c0341ed8>] (drm_ioctl+0x12c/0x444) [ 213.490000] [<c0341ed8>] (drm_ioctl) from [<c0121adc>] (do_vfs_ioctl+0x3f4/0x614) [ 213.490000] [<c0121adc>] (do_vfs_ioctl) from [<c0121d30>] (SyS_ioctl+0x34/0x5c) [ 213.490000] [<c0121d30>] (SyS_ioctl) from [<c000f2c0>] (ret_fast_syscall+0x0/0x34) UBIFS is using PagePrivate() which can have different meanings across filesystems. Therefore the generic page migration code cannot handle this case correctly. We have to implement our own migration function which basically does a plain copy but also duplicates the page private flag. UBIFS is not a block device filesystem and cannot use buffer_migrate_page(). Cc: stable@vger.kernel.org Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> [rw: Massaged changelog, build fixes, etc...] Signed-off-by: Richard Weinberger <richard@nod.at> Acked-by: Christoph Hellwig <hch@lst.de>
2016-05-27Merge tag 'upstream-4.7-rc1' of git://git.infradead.org/linux-ubifsLinus Torvalds
Pull UBI/UBIFS updates from Richard Weinberger: "This contains mostly cleanups and minor improvements of UBI and UBIFS" * tag 'upstream-4.7-rc1' of git://git.infradead.org/linux-ubifs: ubifs: ubifs_dump_inode: Fix dumping field bulk_read UBI: Fix static volume checks when Fastmap is used UBI: Set free_count to zero before walking through erase list UBI: Silence an unintialized variable warning UBI: Clean up return in ubi_remove_volume() UBI: Modify wrong comment in ubi_leb_map function. UBI: Don't read back all data in ubi_eba_copy_leb() UBI: Add ro-mode sysfs attribute
2016-05-27switch xattr_handler->set() to passing dentry and inode separatelyAl Viro
preparation for similar switch in ->setxattr() (see the next commit for rationale). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-24ubifs: ubifs_dump_inode: Fix dumping field bulk_readAndreas Gruenbacher
The wrong field (xattr) is dumped here due to a copy-and-paste error. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-05-20lib/uuid.c: move generate_random_uuid() to uuid.cAndy Shevchenko
Let's gather the UUID related functions under one hood. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: Dmitry Kasatkin <dmitry.kasatkin@gmail.com> Cc: Mimi Zohar <zohar@linux.vnet.ibm.com> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Arnd Bergmann <arnd@arndb.de> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-18Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull remaining vfs xattr work from Al Viro: "The rest of work.xattr (non-cifs conversions)" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: btrfs: Switch to generic xattr handlers ubifs: Switch to generic xattr handlers jfs: Switch to generic xattr handlers jfs: Clean up xattr name mapping gfs2: Switch to generic xattr handlers ceph: kill __ceph_removexattr() ceph: Switch to generic xattr handlers ceph: Get rid of d_find_alias in ceph_set_acl
2016-05-17ubifs: Switch to generic xattr handlersAndreas Gruenbacher
Ubifs internally uses special inodes for storing xattrs. Those inodes had NULL {get,set,remove}xattr inode operations before this change, so xattr operations on them would fail. The super block's s_xattr field would also apply to those special inodes. However, the inodes are not visible outside of ubifs, and so no xattr operations will ever be carried out on them anyway. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by: Richard Weinberger <richard@nod.at> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-09more trivial ->iterate_shared conversionsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-02Merge getxattr prototype change into work.lookupsAl Viro
The rest of work.xattr stuff isn't needed for this branch
2016-04-11->getxattr(): pass dentry and inode as separate argumentsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-04-04mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usageKirill A. Shutemov
Mostly direct substitution with occasional adjustment or removing outdated comments. 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>
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>
2016-03-20ubifs: Remove unused headerAndreas Gruenbacher
UBIFS does not support POSIX ACLs, so there is no need for including any POSIX ACL hesders. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-03-20ubifs: Add logging functions for ubifs_msg, ubifs_err and ubifs_warnJoe Perches
The existing logging macros are fairly large and converting the macros to functions make the object code smaller. Use %pV and __builtin_return_address(0) as appropriate. $ size fs/ubifs/built-in.o* text data bss dec hex filename 575831 309688 161312 1046831 ff92f fs/ubifs/built-in.o.allyesconfig.new 622457 312872 161120 1096449 10bb01 fs/ubifs/built-in.o.allyesconfig.old 223785 640 644 225069 36f2d fs/ubifs/built-in.o.defconfig.new 251873 640 644 253157 3dce5 fs/ubifs/built-in.o.defconfig.old Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-01-22wrappers for ->i_mutex accessAl Viro
parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested}, inode_foo(inode) being mutex_foo(&inode->i_mutex). Please, use those for access to ->i_mutex; over the coming cycle ->i_mutex will become rwsem, with ->lookup() done with it held only shared. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-01-14kmemcg: account certain kmem allocations to memcgVladimir Davydov
Mark those kmem allocations that are known to be easily triggered from userspace as __GFP_ACCOUNT/SLAB_ACCOUNT, which makes them accounted to memcg. For the list, see below: - threadinfo - task_struct - task_delay_info - pid - cred - mm_struct - vm_area_struct and vm_region (nommu) - anon_vma and anon_vma_chain - signal_struct - sighand_struct - fs_struct - files_struct - fdtable and fdtable->full_fds_bits - dentry and external_name - inode for all filesystems. This is the most tedious part, because most filesystems overwrite the alloc_inode method. The list is far from complete, so feel free to add more objects. Nevertheless, it should be close to "account everything" approach and keep most workloads within bounds. Malevolent users will be able to breach the limit, but this was possible even with the former "account everything" approach (simply because it did not account everything in fact). [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Tejun Heo <tj@kernel.org> Cc: Greg Thelen <gthelen@google.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-12Merge tag 'upstream-4.5-rc1' of git://git.infradead.org/linux-ubifsLinus Torvalds
Pull UBI/UBIFS updates from Richard Weinberger: "This contains three changes - two cleanups and one UBI wear leveling improvement by Sebastian Siewior" * tag 'upstream-4.5-rc1' of git://git.infradead.org/linux-ubifs: ubifs: Use XATTR_*_PREFIX_LEN UBIFS: add a comment in key.h for unused parameter mtd: ubi: wl: avoid erasing a PEB which is empty
2016-01-10ubifs: Use XATTR_*_PREFIX_LENRichard Weinberger
...instead of open coding it. Signed-off-by: Richard Weinberger <richard@nod.at>
2016-01-10UBIFS: add a comment in key.h for unused parameterDongsheng Yang
Add a comment in key.h to explain why we keep an unused parameter in key helpers. Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> Signed-off-by: Richard Weinberger <richard@nod.at>
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