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2018-08-15ubifs: Set default assert action to read-onlyRichard Weinberger1-0/+1
Traditionally UBIFS just reported a failed assertion and moved on. The drawback is that users will notice UBIFS bugs when it is too late, most of the time when it is no longer about to mount. This makes bug hunting problematic since valuable information from failing asserts is long gone when UBIFS is dead. The other extreme, panic'ing on a failing assert is also not worthwhile, we want users and developers give a chance to collect as much debugging information as possible if UBIFS hits an assert. Therefore go for the third option, switch to read-only mode when an assert fails. That way UBIFS will not write possible bad data to the MTD and gives users the chance to collect debugging information. Signed-off-by: Richard Weinberger <richard@nod.at>
2018-08-15ubifs: Allow setting assert action as mount parameterRichard Weinberger1-0/+24
Expose our three options to userspace. Signed-off-by: Richard Weinberger <richard@nod.at>
2018-08-15ubifs: Pass struct ubifs_info to ubifs_assert()Richard Weinberger1-22/+23
This allows us to have more context in ubifs_assert() and take different actions depending on the configuration. Signed-off-by: Richard Weinberger <richard@nod.at>
2018-08-15ubifs: Turn two ubifs_assert() into a WARN_ON()Richard Weinberger1-2/+2
We are going to pass struct ubifs_info to ubifs_assert() but while unloading the UBIFS module we don't have the info struct anymore. Therefore replace the asserts by a regular WARN_ON(). Signed-off-by: Richard Weinberger <richard@nod.at>
2018-08-15ubifs: introduce Kconfig symbol for xattr supportStefan Agner1-0/+2
Allow to disable extended attribute support. This aids in reliability testing, especially since some xattr related bugs have surfaced. Also an embedded system might not need it, so this allows for a slightly smaller kernel (about 4KiB). Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Richard Weinberger <richard@nod.at>
2018-06-12treewide: kmalloc() -> kmalloc_array()Kees Cook1-1/+2
The kmalloc() function has a 2-factor argument form, kmalloc_array(). This patch replaces cases of: kmalloc(a * b, gfp) with: kmalloc_array(a * b, gfp) as well as handling cases of: kmalloc(a * b * c, gfp) with: kmalloc(array3_size(a, b, c), gfp) as it's slightly less ugly than: kmalloc_array(array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: kmalloc(4 * 1024, gfp) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. The tools/ directory was manually excluded, since it has its own implementation of kmalloc(). The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ type TYPE; expression THING, E; @@ ( kmalloc( - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | kmalloc( - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression COUNT; typedef u8; typedef __u8; @@ ( kmalloc( - sizeof(u8) * (COUNT) + COUNT , ...) | kmalloc( - sizeof(__u8) * (COUNT) + COUNT , ...) | kmalloc( - sizeof(char) * (COUNT) + COUNT , ...) | kmalloc( - sizeof(unsigned char) * (COUNT) + COUNT , ...) | kmalloc( - sizeof(u8) * COUNT + COUNT , ...) | kmalloc( - sizeof(__u8) * COUNT + COUNT , ...) | kmalloc( - sizeof(char) * COUNT + COUNT , ...) | kmalloc( - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - kmalloc + kmalloc_array ( - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ identifier SIZE, COUNT; @@ - kmalloc + kmalloc_array ( - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( kmalloc( - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kmalloc( - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kmalloc( - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kmalloc( - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kmalloc( - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kmalloc( - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kmalloc( - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kmalloc( - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( kmalloc( - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kmalloc( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kmalloc( - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kmalloc( - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kmalloc( - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | kmalloc( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ identifier STRIDE, SIZE, COUNT; @@ ( kmalloc( - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression E1, E2, E3; constant C1, C2, C3; @@ ( kmalloc(C1 * C2 * C3, ...) | kmalloc( - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | kmalloc( - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | kmalloc( - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | kmalloc( - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( kmalloc(sizeof(THING) * C2, ...) | kmalloc(sizeof(TYPE) * C2, ...) | kmalloc(C1 * C2 * C3, ...) | kmalloc(C1 * C2, ...) | - kmalloc + kmalloc_array ( - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - kmalloc + kmalloc_array ( - (E1) * E2 + E1, E2 , ...) | - kmalloc + kmalloc_array ( - (E1) * (E2) + E1, E2 , ...) | - kmalloc + kmalloc_array ( - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
2018-04-04ubifs: Check ubifs_wbuf_sync() return codeRichard Weinberger1-4/+10
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>
2018-01-11fscrypt: remove 'ci' parameter from fscrypt_put_encryption_info()Eric Biggers1-3/+1
fscrypt_put_encryption_info() is only called when evicting an inode, so the 'struct fscrypt_info *ci' parameter is always NULL, and there cannot be races with other threads. This was cruft left over from the broken key revocation code. Remove the unused parameter and the cmpxchg(). Also remove the #ifdefs around the fscrypt_put_encryption_info() calls, since fscrypt_notsupp.h defines a no-op stub for it. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2017-11-27Rename superblock flags (MS_xyz -> SB_xyz)Linus Torvalds1-10/+10
This is a pure automated search-and-replace of the internal kernel superblock flags. The s_flags are now called SB_*, with the names and the values for the moment mirroring the MS_* flags that they're equivalent to. Note how the MS_xyz flags are the ones passed to the mount system call, while the SB_xyz flags are what we then use in sb->s_flags. The script to do this was: # places to look in; re security/*: it generally should *not* be # touched (that stuff parses mount(2) arguments directly), but # there are two places where we really deal with superblock flags. FILES="drivers/mtd drivers/staging/lustre fs ipc mm \ include/linux/fs.h include/uapi/linux/bfs_fs.h \ security/apparmor/apparmorfs.c security/apparmor/include/lib.h" # the list of MS_... constants SYMS="RDONLY NOSUID NODEV NOEXEC SYNCHRONOUS REMOUNT MANDLOCK \ DIRSYNC NOATIME NODIRATIME BIND MOVE REC VERBOSE SILENT \ POSIXACL UNBINDABLE PRIVATE SLAVE SHARED RELATIME KERNMOUNT \ I_VERSION STRICTATIME LAZYTIME SUBMOUNT NOREMOTELOCK NOSEC BORN \ ACTIVE NOUSER" SED_PROG= for i in $SYMS; do SED_PROG="$SED_PROG -e s/MS_$i/SB_$i/g"; done # we want files that contain at least one of MS_..., # with fs/namespace.c and fs/pnode.c excluded. L=$(for i in $SYMS; do git grep -w -l MS_$i $FILES; done| sort|uniq|grep -v '^fs/namespace.c'|grep -v '^fs/pnode.c') for f in $L; do sed -i $f $SED_PROG; done Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-10-18fscrypt: remove unneeded empty fscrypt_operations structsEric Biggers1-5/+2
In the case where a filesystem has been configured without encryption support, there is no longer any need to initialize ->s_cop at all, since none of the methods are ever called. Reviewed-by: Chao Yu <yuchao0@huawei.com> Acked-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2017-10-18fscrypt: remove ->is_encrypted()Eric Biggers1-1/+0
Now that all callers of fscrypt_operations.is_encrypted() have been switched to IS_ENCRYPTED(), remove ->is_encrypted(). Reviewed-by: Chao Yu <yuchao0@huawei.com> Acked-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2017-07-17VFS: Convert sb->s_flags & MS_RDONLY to sb_rdonly(sb)David Howells1-1/+1
Firstly by applying the following with coccinelle's spatch: @@ expression SB; @@ -SB->s_flags & MS_RDONLY +sb_rdonly(SB) to effect the conversion to sb_rdonly(sb), then by applying: @@ expression A, SB; @@ ( -(!sb_rdonly(SB)) && A +!sb_rdonly(SB) && A | -A != (sb_rdonly(SB)) +A != sb_rdonly(SB) | -A == (sb_rdonly(SB)) +A == sb_rdonly(SB) | -!(sb_rdonly(SB)) +!sb_rdonly(SB) | -A && (sb_rdonly(SB)) +A && sb_rdonly(SB) | -A || (sb_rdonly(SB)) +A || sb_rdonly(SB) | -(sb_rdonly(SB)) != A +sb_rdonly(SB) != A | -(sb_rdonly(SB)) == A +sb_rdonly(SB) == A | -(sb_rdonly(SB)) && A +sb_rdonly(SB) && A | -(sb_rdonly(SB)) || A +sb_rdonly(SB) || A ) @@ expression A, B, SB; @@ ( -(sb_rdonly(SB)) ? 1 : 0 +sb_rdonly(SB) | -(sb_rdonly(SB)) ? A : B +sb_rdonly(SB) ? A : B ) to remove left over excess bracketage and finally by applying: @@ expression A, SB; @@ ( -(A & MS_RDONLY) != sb_rdonly(SB) +(bool)(A & MS_RDONLY) != sb_rdonly(SB) | -(A & MS_RDONLY) == sb_rdonly(SB) +(bool)(A & MS_RDONLY) == sb_rdonly(SB) ) to make comparisons against the result of sb_rdonly() (which is a bool) work correctly. Signed-off-by: David Howells <dhowells@redhat.com>
2017-07-14ubifs: Fix oops when remounting with no_bulk_read.karam.lee1-0/+2
When remounting with the no_bulk_read option, there is a problem accessing the "bulk_read buffer(bu.buf)" which has already been freed. If the bulk_read option is enabled, ubifs_tnc_bulk_read uses the pre-allocated bu.buf. While bu.buf is being used by ubifs_tnc_bulk_read, remounting with no_bulk_read frees bu.buf. So I added code to check the use of "bu.buf" to avoid this situation. ------ I tested as follows(kernel v3.18) : Use the script to repeat "no_bulk_read <-> bulk_read" remount.sh #!/bin/sh while true do; mount -o remount,no_bulk_read ${MOUNT_POINT}; sleep 1; mount -o remount,bulk_read ${MOUNT_POINT}; sleep 1; done Perform read operation cat ${MOUNT_POINT}/* > /dev/null The problem is reproduced immediately. [ 234.256845][kernel.0]Internal error: Oops: 17 [#1] PREEMPT ARM [ 234.258557][kernel.0]CPU: 0 PID: 2752 Comm: cat Tainted: G W O 3.18.31+ #51 [ 234.259531][kernel.0]task: cbff8580 ti: cbd66000 task.ti: cbd66000 [ 234.260306][kernel.0]PC is at validate_data_node+0x10/0x264 [ 234.260994][kernel.0]LR is at ubifs_tnc_bulk_read+0x388/0x3ec [ 234.261712][kernel.0]pc : [<c01d98fc>] lr : [<c01dc300>] psr: 80000013 [ 234.261712][kernel.0]sp : cbd67ba0 ip : 00000001 fp : 00000000 [ 234.263337][kernel.0]r10: cd3e0260 r9 : c0df2008 r8 : 00000000 [ 234.264087][kernel.0]r7 : cd3e0000 r6 : 00000000 r5 : cd3e0278 r4 : cd3e0000 [ 234.264999][kernel.0]r3 : 00000003 r2 : cd3e0280 r1 : 00000000 r0 : cd3e0000 [ 234.265910][kernel.0]Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 234.266896][kernel.0]Control: 10c53c7d Table: 8c40c059 DAC: 00000015 [ 234.267711][kernel.0]Process cat (pid: 2752, stack limit = 0xcbd66400) [ 234.268525][kernel.0]Stack: (0xcbd67ba0 to 0xcbd68000) [ 234.269169][kernel.0]7ba0: cd7c3940 c03d8650 0001bfe0 00002ab2 00000000 cbd67c5c cbd67c58 0001bfe0 [ 234.270287][kernel.0]7bc0: cd3e0000 00002ab2 0001bfe0 00000014 cbd66000 cd3e0260 00000000 c01d6660 [ 234.271403][kernel.0]7be0: 00002ab2 00000000 c82a5800 ffffffff cd3e0298 cd3e0278 00000000 cd3e0000 [ 234.272520][kernel.0]7c00: 00000000 00000000 cd3e0260 c01dc300 00002ab2 00000000 60000013 d663affa [ 234.273639][kernel.0]7c20: cd3e01f0 cd3e01f0 60000013 c09397ec 00000000 cd3e0278 00002ab2 00000000 [ 234.274755][kernel.0]7c40: cd3e0000 c01dbf48 00000014 00000003 00000160 00000015 00000004 d663affa [ 234.275874][kernel.0]7c60: ccdaa978 cd3e0278 cd3e0000 cf32a5f4 ccdaa820 00000044 cbd66000 cd3e0260 [ 234.276992][kernel.0]7c80: 00000003 c01cec84 ccdaa8dc cbd67cc4 cbd67ec0 00000010 ccdaa978 00000000 [ 234.278108][kernel.0]7ca0: 0000015e ccdaa8dc 00000000 00000000 cf32a5d0 00000000 0000015f ccdaa8dc [ 234.279228][kernel.0]7cc0: 00000000 c8488300 0009e5a4 0000000e cbd66000 0000015e cf32a5f4 c0113c04 [ 234.280346][kernel.0]7ce0: 0000009f 0000003c c00098c4 ffffffff 00001000 00000000 000000ad 00000010 [ 234.281463][kernel.0]7d00: 00000038 cd68f580 00000150 c8488360 00000000 cbd67d30 cbd67d70 0000000e [ 234.282579][kernel.0]7d20: 00000010 00000000 c0951874 c0112a9c cf379b60 cf379b84 cf379890 cf3798b4 [ 234.283699][kernel.0]7d40: cf379578 cf37959c cf379380 cf3793a4 cf3790b0 cf3790d4 cf378fd8 cf378ffc [ 234.284814][kernel.0]7d60: cf378f48 cf378f6c cf32a5f4 cf32a5d0 00000000 00001000 00000018 00000000 [ 234.285932][kernel.0]7d80: 00001000 c0050da4 00000000 00001000 cec04c00 00000000 00001000 c0e11328 [ 234.287049][kernel.0]7da0: 00000000 00001000 cbd66000 00000000 00001000 c0012a60 00000000 00001000 [ 234.288166][kernel.0]7dc0: cbd67dd4 00000000 00001000 80000013 00000000 00001000 cd68f580 00000000 [ 234.289285][kernel.0]7de0: 00001000 c915d600 00000000 00001000 cbd67e48 00000000 00001000 00000018 [ 234.290402][kernel.0]7e00: 00000000 00001000 00000000 00000000 00001000 c915d768 c915d768 c0113550 [ 234.291522][kernel.0]7e20: cd68f580 cbd67e48 cd68f580 cb6713c0 00010000 000ac5a4 00000000 001fc5a4 [ 234.292637][kernel.0]7e40: 00000000 c8488300 cbd67ec0 00eb0000 cd68f580 c0113ee4 00000000 cbd67ec0 [ 234.293754][kernel.0]7e60: cd68f580 c8488300 cbd67ec0 00eb0000 cd68f580 00150000 c8488300 00eb0000 [ 234.294874][kernel.0]7e80: 00010000 c0112fd0 00000000 cbd67ec0 cd68f580 00150000 00000000 cd68f580 [ 234.295991][kernel.0]7ea0: cbd67ef0 c011308c 00000000 00000002 cd768850 00010000 00000000 c01133fc [ 234.297110][kernel.0]7ec0: 00150000 00000000 cbd67f50 00000000 00000000 cb6713c0 01000000 cbd67f48 [ 234.298226][kernel.0]7ee0: cbd67f50 c8488300 00000000 c0113204 00010000 01000000 00000000 cb6713c0 [ 234.299342][kernel.0]7f00: 00150000 00000000 cbd67f50 00000000 00000000 00000000 00000000 00000000 [ 234.300462][kernel.0]7f20: cbd67f50 01000000 01000000 cb6713c0 c8488300 c00ebba8 01000000 00000000 [ 234.301577][kernel.0]7f40: c8488300 cb6713c0 00000000 00000000 00000000 00000000 ccdaa820 00000000 [ 234.302697][kernel.0]7f60: 00000000 01000000 00000003 00000001 cbd66000 00000000 00000001 c00ec678 [ 234.303813][kernel.0]7f80: 00000000 00000200 00000000 01000000 01000000 00000000 00000000 000000ef [ 234.304933][kernel.0]7fa0: c000e904 c000e780 01000000 00000000 00000001 00000003 00000000 01000000 [ 234.306049][kernel.0]7fc0: 01000000 00000000 00000000 000000ef 00000001 00000003 01000000 00000001 [ 234.307165][kernel.0]7fe0: 00000000 beafb78c 0000ad08 00128d1c 60000010 00000001 00000000 00000000 [ 234.308292][kernel.0][<c01d98fc>] (validate_data_node) from [<c01dc300>] (ubifs_tnc_bulk_read+0x388/0x3ec) [ 234.309493][kernel.0][<c01dc300>] (ubifs_tnc_bulk_read) from [<c01cec84>] (ubifs_readpage+0x1dc/0x46c) [ 234.310656][kernel.0][<c01cec84>] (ubifs_readpage) from [<c0113c04>] (__generic_file_splice_read+0x29c/0x4cc) [ 234.311890][kernel.0][<c0113c04>] (__generic_file_splice_read) from [<c0113ee4>] (generic_file_splice_read+0xb0/0xf4) [ 234.313214][kernel.0][<c0113ee4>] (generic_file_splice_read) from [<c0112fd0>] (do_splice_to+0x68/0x7c) [ 234.314386][kernel.0][<c0112fd0>] (do_splice_to) from [<c011308c>] (splice_direct_to_actor+0xa8/0x190) [ 234.315544][kernel.0][<c011308c>] (splice_direct_to_actor) from [<c0113204>] (do_splice_direct+0x90/0xb8) [ 234.316741][kernel.0][<c0113204>] (do_splice_direct) from [<c00ebba8>] (do_sendfile+0x17c/0x2b8) [ 234.317838][kernel.0][<c00ebba8>] (do_sendfile) from [<c00ec678>] (SyS_sendfile64+0xc4/0xcc) [ 234.318890][kernel.0][<c00ec678>] (SyS_sendfile64) from [<c000e780>] (ret_fast_syscall+0x0/0x38) [ 234.319983][kernel.0]Code: e92d47f0 e24dd050 e59f9228 e1a04000 (e5d18014) Signed-off-by: karam.lee <karam.lee@lge.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2017-07-14ubifs: allow userspace to map mounts to volumesRabin Vincent1-0/+7
There currently appears to be no way for userspace to find out the underlying volume number for a mounted ubifs file system, since ubifs uses anonymous block devices. The volume name is present in /proc/mounts but UBI volumes can be renamed after the volume has been mounted. To remedy this, show the UBI number and UBI volume number as part of the options visible under /proc/mounts. Also, accept and ignore the ubi= vol= options if they are used mounting (patch from Richard Weinberger). # mount -t ubifs ubi:baz x # mount ubi:baz on /root/x type ubifs (rw,relatime,ubi=0,vol=2) # ubirename /dev/ubi0 baz bazz # mount ubi:baz on /root/x type ubifs (rw,relatime,ubi=0,vol=2) # ubinfo -d 0 -n 2 Volume ID: 2 (on ubi0) Type: dynamic Alignment: 1 Size: 67 LEBs (1063424 bytes, 1.0 MiB) State: OK Name: bazz Character device major/minor: 254:3 Signed-off-by: Rabin Vincent <rabinv@axis.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2017-07-14ubifs: Unexport ubifs_inode_slabRichard Weinberger1-1/+1
This SLAB is only being used in super.c, there is no need to expose it into the global namespace. Signed-off-by: Richard Weinberger <richard@nod.at>
2017-04-20ubifs: Convert to separately allocated bdiJan Kara1-16/+9
Allocate struct backing_dev_info separately instead of embedding it inside the superblock. This unifies handling of bdi among users. CC: Richard Weinberger <richard@nod.at> CC: Artem Bityutskiy <dedekind1@gmail.com> CC: Adrian Hunter <adrian.hunter@intel.com> CC: linux-mtd@lists.infradead.org Acked-by: Richard Weinberger <richard@nod.at> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Jens Axboe <axboe@fb.com>
2017-02-08fscrypt: constify struct fscrypt_operationsEric Biggers1-1/+1
Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Richard Weinberger <richard@nod.at>
2016-12-12ubifs: Add support for encrypted symlinksRichard Weinberger1-1/+0
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-12-12ubifs: Implement encrypt/decrypt for all IORichard Weinberger1-2/+4
Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: David Gstir <david@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-12-12ubifs: Constify struct inode pointer in ubifs_crypt_is_encrypted()Richard Weinberger1-1/+1
...and provide a non const variant for fscrypto Signed-off-by: Richard Weinberger <richard@nod.at>
2016-12-12ubifs: Add skeleton for fscryptoRichard Weinberger1-0/+10
This is the first building block to provide file level encryption on UBIFS. Signed-off-by: Richard Weinberger <richard@nod.at>
2016-07-29ubifs: Silence early error messages if MS_SILENT is setDaniel Golle1-7/+7
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: Silence error output if MS_SILENT is setDaniel Golle1-2/+3
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>
2016-05-18Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds1-0/+1
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 Gruenbacher1-0/+1
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>
2016-04-04mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usageKirill A. Shutemov1-1/+1
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. Shutemov1-2/+2
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>
2016-01-14kmemcg: account certain kmem allocations to memcgVladimir Davydov1-2/+2
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>
2015-11-13Merge branch 'for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds1-1/+0
Pull vfs xattr cleanups from Al Viro. * 'for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: f2fs: xattr simplifications squashfs: xattr simplifications 9p: xattr simplifications xattr handlers: Pass handler to operations instead of flags jffs2: Add missing capability check for listing trusted xattrs hfsplus: Remove unused xattr handler list operations ubifs: Remove unused security xattr handler vfs: Fix the posix_acl_xattr_list return value vfs: Check attribute names in posix acl xattr handers
2015-11-13ubifs: Remove unused security xattr handlerAndreas Gruenbacher1-1/+0
Ubifs installs a security xattr handler in sb->s_xattr but doesn't use the generic_{get,set,list,remove}xattr inode operations needed for processing this list of attribute handlers; the handler is never called. Instead, ubifs uses its own xattr handlers which also process security xattrs. Remove the dead code. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by: Richard Weinberger <richard@nod.at> Cc: Artem Bityutskiy <dedekind1@gmail.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: linux-mtd@lists.infradead.org Cc: Subodh Nijsure <snijsure@grid-net.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-11-07ubifs: introduce UBIFS_ATIME_SUPPORT to ubifsDongsheng Yang1-2/+10
To make ubifs support atime flexily, this commit introduces a Kconfig option named as UBIFS_ATIME_SUPPORT. With UBIFS_ATIME_SUPPORT=n: ubifs keeps the full compatibility to no_atime from the start of ubifs. =================UBIFS_ATIME_SUPPORT=n======================= -o - no atime -o atime - no atime -o noatime - no atime -o relatime - no atime -o strictatime - no atime -o lazyatime - no atime With UBIFS_ATIME_SUPPORT=y: ubifs supports the atime same with other main stream file systems. =================UBIFS_ATIME_SUPPORT=y======================= -o - default behavior (relatime currently) -o atime - atime support -o noatime - no atime support -o relatime - relative atime support -o strictatime - strict atime support -o lazyatime - lazy atime support Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> Reviewed-by: Richard Weinberger <richard@nod.at> Signed-off-by: Richard Weinberger <richard@nod.at>
2015-06-25Merge tag 'upstream-4.2-rc1' of git://git.infradead.org/linux-ubifsLinus Torvalds1-1/+4
Pull UBI/UBIFS updates from Richard Weinberger: "Minor fixes for UBI and UBIFS" * tag 'upstream-4.2-rc1' of git://git.infradead.org/linux-ubifs: UBI: Remove unnecessary `\' UBI: Use static class and attribute groups UBI: add a helper function for updatting on-flash layout volumes UBI: Fastmap: Do not add vol if it already exists UBI: Init vol->reserved_pebs by assignment UBI: Fastmap: Rename variables to make them meaningful UBI: Fastmap: Remove unnecessary `\' UBI: Fastmap: Use max() to get the larger value ubifs: fix to check error code of register_shrinker UBI: block: Dynamically allocate minor numbers
2015-06-02ubifs: fix to check error code of register_shrinkerChao Yu1-1/+4
register_shrinker() in ubifs_init() can fail due to fail to call kzalloc. This patch fixes to check the return value of register_shrinker, otherwise our shrinker may be unregistered after ubifs initialized successfully. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2015-05-10ubifs: switch to simple_follow_link()Al Viro1-0/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-03-25UBIFS: extend debug/message capabilitiesSheng Yong1-52/+53
In the case where we have more than one volumes on different UBI devices, it may be not that easy to tell which volume prints the messages. Add ubi number and volume id in ubifs_msg/warn/error to help debug. These two values are passed by struct ubifs_info. For those where ubifs_info is not initialized yet, ubifs_* is replaced by pr_*. For those where ubifs_info is not avaliable, ubifs_info is passed to the calling function as a const parameter. The output looks like, [ 95.444879] UBIFS (ubi0:1): background thread "ubifs_bgt0_1" started, PID 696 [ 95.484688] UBIFS (ubi0:1): UBIFS: mounted UBI device 0, volume 1, name "test1" [ 95.484694] UBIFS (ubi0:1): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes [ 95.484699] UBIFS (ubi0:1): FS size: 30220288 bytes (28 MiB, 238 LEBs), journal size 1523712 bytes (1 MiB, 12 LEBs) [ 95.484703] UBIFS (ubi0:1): reserved for root: 1427378 bytes (1393 KiB) [ 95.484709] UBIFS (ubi0:1): media format: w4/r0 (latest is w4/r0), UUID 40DFFC0E-70BE-4193-8905-F7D6DFE60B17, small LPT model [ 95.489875] UBIFS (ubi1:0): background thread "ubifs_bgt1_0" started, PID 699 [ 95.529713] UBIFS (ubi1:0): UBIFS: mounted UBI device 1, volume 0, name "test2" [ 95.529718] UBIFS (ubi1:0): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes [ 95.529724] UBIFS (ubi1:0): FS size: 19808256 bytes (18 MiB, 156 LEBs), journal size 1015809 bytes (0 MiB, 8 LEBs) [ 95.529727] UBIFS (ubi1:0): reserved for root: 935592 bytes (913 KiB) [ 95.529733] UBIFS (ubi1:0): media format: w4/r0 (latest is w4/r0), UUID EEB7779D-F419-4CA9-811B-831CAC7233D4, small LPT model [ 954.264767] UBIFS error (ubi1:0 pid 756): ubifs_read_node: bad node type (255 but expected 6) [ 954.367030] UBIFS error (ubi1:0 pid 756): ubifs_read_node: bad node at LEB 0:0, LEB mapping status 1 Signed-off-by: Sheng Yong <shengyong1@huawei.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2015-03-25UBIFS: do not write master node if need recoverySheng Yong1-1/+1
The commits 781c571 ("UBIFS: intialize LPT earlier") and 0980119 ("UBIFS: fix-up free space earlier") move some initialization before marking the master node dirty. But the modification changes the conditions of writing master. If unclean umount happens, ubifs may fail when mounting. But trying to mount it will write new master nodes on the flash. This is useless but increasing sqnum. So check need_recovery before writing master node, and don't create new master node if filesystem needs recovery. The behavour of the bug shows at: http://lists.infradead.org/pipermail/linux-mtd/2015-February/057712.html Signed-off-by: Sheng Yong <shengyong1@huawei.com> Reviewed-by: Ben Gardiner <ben.l.gardiner@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2015-02-15Merge branch 'for-linus-v3.20' of git://git.infradead.org/linux-ubifsLinus Torvalds1-0/+1
Pull UBI and UBIFS updates from Richard Weinberger: - cleanups and bug fixes all over UBI and UBIFS - block-mq support for UBI Block - UBI volumes can now be renamed while they are in use - security.* XATTR support for UBIFS - a maintainer update * 'for-linus-v3.20' of git://git.infradead.org/linux-ubifs: UBI: block: Fix checking for NULL instead of IS_ERR() UBI: block: Continue creating ubiblocks after an initialization error UBIFS: return -EINVAL if log head is empty UBI: Block: Explain usage of blk_rq_map_sg() UBI: fix soft lockup in ubi_check_volume() UBI: Fastmap: Care about the protection queue UBIFS: add a couple of extra asserts UBI: do propagate positive error codes up UBI: clean-up printing helpers UBI: extend UBI layer debug/messaging capabilities - cosmetics UBIFS: add ubifs_err() to print error reason UBIFS: Add security.* XATTR support for the UBIFS UBIFS: Add xattr support for symlinks UBI: Block: Add blk-mq support UBI: Add initial support for scatter gather UBI: rename_volumes: Use UBI_METAONLY UBI: Implement UBI_METAONLY Add myself as UBI co-maintainer
2015-01-28UBIFS: Add security.* XATTR support for the UBIFSSubodh Nijsure1-0/+1
Artem: rename static functions so that they do not use the "ubifs_" prefix - we only use this prefix for non-static functions. Artem: remove few junk white-space changes in file.c Signed-off-by: Subodh Nijsure <snijsure@grid-net.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Ben Shelton <ben.shelton@ni.com> Acked-by: Brad Mouring <brad.mouring@ni.com> Acked-by: Terry Wilcox <terry.wilcox@ni.com> Acked-by: Gratian Crisan <gratian.crisan@ni.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2015-01-20fs: remove mapping->backing_dev_infoChristoph Hellwig1-3/+0
Now that we never use the backing_dev_info pointer in struct address_space we can simply remove it and save 4 to 8 bytes in every inode. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Reviewed-by: Tejun Heo <tj@kernel.org> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Jens Axboe <axboe@fb.com>
2015-01-20fs: introduce f_op->mmap_capabilities for nommu mmap supportChristoph Hellwig1-1/+1
Since "BDI: Provide backing device capability information [try #3]" the backing_dev_info structure also provides flags for the kind of mmap operation available in a nommu environment, which is entirely unrelated to it's original purpose. Introduce a new nommu-only file operation to provide this information to the nommu mmap code instead. Splitting this from the backing_dev_info structure allows to remove lots of backing_dev_info instance that aren't otherwise needed, and entirely gets rid of the concept of providing a backing_dev_info for a character device. It also removes the need for the mtd_inodefs filesystem. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Tejun Heo <tj@kernel.org> Acked-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-07-19UBIFS: remove mst_mutexArtem Bityutskiy1-1/+0
The 'mst_mutex' is not needed since because 'ubifs_write_master()' is only called on the mount path and commit path. The mount path is sequential and there is no parallelism, and the commit path is also serialized - there is only one commit going on at a time. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-07-19UBIFS: replace seq_printf by seq_putsFabian Frederick1-6/+6
Fix checkpatch warnings: "WARNING: Prefer seq_puts to seq_printf" Andrew Morton wrote: " - puts is presumably faster - puts doesn't go rogue if you accidentally pass it a "%". - this patch actually made fs/ubifs/super.o 12 bytes smaller. Perhaps because seq_printf() is a varargs function, forcing the caller to pass args on the stack instead of in registers. " Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-07-19UBIFS: replace count*size kzalloc by kcallocFabian Frederick1-2/+2
kcalloc manages count*sizeof overflow. Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-07-19UBIFS: remove useless statementshujianyang1-1/+1
This patch removes useless and duplicate statements. Signed-off-by: hujianyang <hujianyang@huawei.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-06-02UBIFS: respect MS_SILENT mount flagDaniel Golle1-0/+5
When attempting to mount a non-ubifs formatted volume, lots of error messages (including a stack dump) are thrown to the kernel log even if the MS_SILENT mount flag is set. Fix this by introducing adding an additional state-variable in struct ubifs_info and suppress error messages in ubifs_read_node if MS_SILENT is set. Signed-off-by: Daniel Golle <daniel@makrotopia.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-05-05UBIFS: fix remount error pathArtem Bityutskiy1-1/+1
Dan's "smatch" checker found out that there was a bug in the error path of the 'ubifs_remount_rw()' function. Instead of jumping to the "out" label which cleans-things up, we just returned. This patch fixes the problem. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-04-04Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4Linus Torvalds1-0/+1
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 Weiner1-1/+1
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 <hannes@cmpxchg.org> Reviewed-by: Rik van Riel <riel@redhat.com> Reviewed-by: Minchan Kim <minchan@kernel.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Bob Liu <bob.liu@oracle.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Dave Chinner <david@fromorbit.com> Cc: Greg Thelen <gthelen@google.com> Cc: Hugh Dickins <hughd@google.com> Cc: Jan Kara <jack@suse.cz> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Luigi Semenzato <semenzato@google.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Metin Doslu <metin@citusdata.com> Cc: Michel Lespinasse <walken@google.com> Cc: Ozgun Erdogan <ozgun@citusdata.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Roman Gushchin <klamm@yandex-team.ru> Cc: Ryan Mallon <rmallon@gmail.com> Cc: Tejun Heo <tj@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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" <tytso@mit.edu> Cc: linux-fsdevel@vger.kernel.org Cc: Christoph Hellwig <hch@infradead.org> Cc: Artem Bityutskiy <dedekind1@gmail.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Evgeniy Dushistov <dushistov@mail.ru> Cc: Jan Kara <jack@suse.cz> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: Anders Larsen <al@alarsen.net> Cc: Phillip Lougher <phillip@squashfs.org.uk> Cc: Kees Cook <keescook@chromium.org> Cc: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz> Cc: Petr Vandrovec <petr@vandrovec.name> Cc: xfs@oss.sgi.com Cc: linux-btrfs@vger.kernel.org Cc: linux-cifs@vger.kernel.org Cc: samba-technical@lists.samba.org Cc: codalist@coda.cs.cmu.edu Cc: linux-ext4@vger.kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net Cc: fuse-devel@lists.sourceforge.net Cc: cluster-devel@redhat.com Cc: linux-mtd@lists.infradead.org Cc: jfs-discussion@lists.sourceforge.net Cc: linux-nfs@vger.kernel.org Cc: linux-nilfs@vger.kernel.org Cc: linux-ntfs-dev@lists.sourceforge.net Cc: ocfs2-devel@oss.oracle.com Cc: reiserfs-devel@vger.kernel.org
2014-01-23fs/ubifs: use rbtree postorder iteration helper instead of opencodingCody P Schafer1-20/+4
Use rbtree_postorder_for_each_entry_safe() to destroy the rbtree instead of opencoding an alternate postorder iteration that modifies the tree Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> Cc: Michel Lespinasse <walken@google.com> Cc: Jan Kara <jack@suse.cz> Cc: Artem Bityutskiy <dedekind1@gmail.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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