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2012-03-04ext4: simplify handling of the errors=* mount optionsTheodore Ts'o2-6/+4
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-03-02ext4: remove the I_VERSION mount flag and use the super_block flag insteadTheodore Ts'o3-4/+2
There's no point to have two bits that are set in parallel; so use the MS_I_VERSION flag that is needed by the VFS anyway, and that way we free up a bit in sbi->s_mount_opts. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-03-02ext4: remove Opt_ignoreTheodore Ts'o1-3/+1
This is completely unused so let's just get rid of it. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-03-02ext4: remove deprecation warnings for minix_df and grpidTheodore Ts'o1-11/+1
People complained about removing both of these features, so per Linus's dictate, we won't be able to remove them. Sigh... Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-02-27ext4: Fix endianness bug when reading the MMP blockSantosh Nayak1-2/+2
Sparse complained about this endian bug in fs/ext4/mmp.c. Signed-off-by: Santosh Nayak <santoshprasadnayak@gmail.com> Reviewed-by: Johann Lombardi <johann@whamcloud.com> Reviewed-by: Andreas Dilger <adilger@dilger.ca> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-02-21ext4: format flag in dx_probe()Zheng Liu1-1/+1
Fix ext4_warning format flag in dx_probe(). CC: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Zheng Liu <wenqing.lz@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-02-21ext4: avoid deadlock on sync-mounted FS w/o journalEric Sandeen1-3/+4
Processes hang forever on a sync-mounted ext2 file system that is mounted with the ext4 module (default in Fedora 16). I can reproduce this reliably by mounting an ext2 partition with "-o sync" and opening a new file an that partition with vim. vim will hang in "D" state forever. The same happens on ext4 without a journal. I am attaching a small patch here that solves this issue for me. In the sync mounted case without a journal, ext4_handle_dirty_metadata() may call sync_dirty_buffer(), which can't be called with buffer lock held. Also move mb_cache_entry_release inside lock to avoid race fixed previously by 8a2bfdcb ext[34]: EA block reference count racing fix Note too that ext2 fixed this same problem in 2006 with b2f49033 [PATCH] fix deadlock in ext2 Signed-off-by: Martin.Wilck@ts.fujitsu.com [sandeen@redhat.com: move mb_cache_entry_release before unlock, edit commit msg] Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-02-21ext4: fix resize when resizing within single groupLukas Czerner1-6/+8
When resizing file system in the way that the new size of the file system is still in the same group (no new groups are added), then we can hit a BUG_ON in ext4_alloc_group_tables() BUG_ON(flex_gd->count == 0 || group_data == NULL); because flex_gd->count is zero. The reason is the missing check for such case, so the code always extend the last group fully and then attempt to add more groups, but at that time n_blocks_count is actually smaller than o_blocks_count. It can be easily reproduced like this: mkfs.ext4 -b 4096 /dev/sda 30M mount /dev/sda /mnt/test resize2fs /dev/sda 50M Fix this by checking whether the resize happens within the singe group and only add that many blocks into the last group to satisfy user request. Then o_blocks_count == n_blocks_count and the resize will exit successfully without and attempt to add more groups into the fs. Also fix mixing together block number and blocks count which might be confusing and can easily lead to off-by-one errors (but it is actually not the case here since the two occurrence of this mix-up will cancel each other). Signed-off-by: Lukas Czerner <lczerner@redhat.com> Reported-by: Milan Broz <mbroz@redhat.com> Reviewed-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-02-21ext4: fix race between unwritten extent conversion and truncateJeff Moyer3-5/+8
The following comment in ext4_end_io_dio caught my attention: /* XXX: probably should move into the real I/O completion handler */ inode_dio_done(inode); The truncate code takes i_mutex, then calls inode_dio_wait. Because the ext4 code path above will end up dropping the mutex before it is reacquired by the worker thread that does the extent conversion, it seems to me that the truncate can happen out of order. Jan Kara mentioned that this might result in error messages in the system logs, but that should be the extent of the "damage." The fix is pretty straight-forward: don't call inode_dio_done until the extent conversion is complete. Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
2012-02-21ext4: fix balloc.c printk-format-warningHeiko Carstens1-1/+1
Get rid of this one: fs/ext4/balloc.c: In function 'ext4_wait_block_bitmap': fs/ext4/balloc.c:405:3: warning: format '%llu' expects argument of type 'long long unsigned int', but argument 6 has type 'sector_t' [-Wformat] Happens because sector_t is u64 (unsigned long long) or unsigned long dependent on CONFIG_64BIT. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-02-21ext4: remove EXT4_MB_{BITMAP,BUDDY} macrosTheodore Ts'o2-18/+16
The EXT4_MB_BITMAP and EXT4_MB_BUDDY macros obfuscate more than they provide any abstraction. So remove them. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-02-21ext4: using PTR_ERR() on the wrong variable in ext4_ext_migrate()Dan Carpenter1-1/+1
"inode" is a valid pointer here. "tmp_inode" was intended. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-02-21ext4: remove an unneeded NULL check in __ext4_check_dir_entry()Dan Carpenter1-4/+4
We dereference "bh" unconditionally a couple lines down to find "by->b_size". This function is never called with a NULL "bh" so I have removed the check. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-02-21ext4: remove unneeded variable in ext4_xattr_check_block()Zheng Liu1-4/+1
We could return directly from ext4_xattr_check_block(). Thus, we shouldn't need to define a 'error' variable. Signed-off-by: Zheng Liu <wenqing.lz@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-02-21ext4: remove the resize mount optionEric Sandeen1-23/+6
The resize mount option seems to be of limited value, especially in the age of online resize2fs. Nuke it. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-02-21ext4: remove the journal=update mount optionEric Sandeen1-25/+1
The V2 journal format was introduced around ten years ago, for ext3. It seems highly unlikely that anyone will need this migration option for ext4. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-02-21ext4: mark possibly unused variable in ext4_mb_normalize_request()Curt Wohlgemuth1-1/+2
The 'orig_size' local variable is only used in a call to mb_debug(). Mark it with '__maybe_unused'. Signed-off-by: Curt Wohlgemuth <curtw@google.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-02-21ext4: expand commit callback andBobi Jam4-88/+171
The per-commit callback was used by mballoc code to manage free space bitmaps after deleted blocks have been released. This patch expands it to support multiple different callbacks, to allow other things to be done after the commit has been completed. Signed-off-by: Bobi Jam <bobijam@whamcloud.com> Signed-off-by: Andreas Dilger <adilger@whamcloud.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-02-21ext4: fix INCOMPAT feature codepoint reservation for INLINEDATATheodore Ts'o1-1/+2
In commit 9b90e5e028 I incorrectly reserved the wrong bit for EXT4_FEATURE_INCOMPAT_INLINEDATA per the discussion on the linux-ext4 list on December 7, 2011. The codepoint 0x2000 should be used for EXT4_FEATURE_INCOMPAT_USE_META_CSUM, so INLINEDATA will be assigned the value 0x8000. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-02-21ext4: ignore EXT4_INODE_JOURNAL_DATA flag with delallocLukas Czerner2-41/+51
Ext4 does not support data journalling with delayed allocation enabled. We even do not allow to mount the file system with delayed allocation and data journalling enabled, however it can be set via FS_IOC_SETFLAGS so we can hit the inode with EXT4_INODE_JOURNAL_DATA set even on file system mounted with delayed allocation (default) and that's where problem arises. The easies way to reproduce this problem is with the following set of commands: mkfs.ext4 /dev/sdd mount /dev/sdd /mnt/test1 dd if=/dev/zero of=/mnt/test1/file bs=1M count=4 chattr +j /mnt/test1/file dd if=/dev/zero of=/mnt/test1/file bs=1M count=4 conv=notrunc chattr -j /mnt/test1/file Additionally it can be reproduced quite reliably with xfstests 272 and 269. In fact the above reproducer is a part of test 272. To fix this we should ignore the EXT4_INODE_JOURNAL_DATA inode flag if the file system is mounted with delayed allocation. This can be easily done by fixing ext4_should_*_data() functions do ignore data journal flag when delalloc is set (suggested by Ted). We also have to set the appropriate address space operations for the inode (again, ignoring data journal flag if delalloc enabled). Additionally this commit introduces ext4_inode_journal_mode() function because ext4_should_*_data() has already had a lot of common code and this change is putting it all into one function so it is easier to read. Successfully tested with xfstests in following configurations: delalloc + data=ordered delalloc + data=writeback data=journal nodelalloc + data=ordered nodelalloc + data=writeback nodelalloc + data=journal Signed-off-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
2012-02-21ext4: fix race when setting bitmap_uptodate flagTheodore Ts'o4-93/+86
In ext4_read_{inode,block}_bitmap() we were setting bitmap_uptodate() before submitting the buffer for read. The is bad, since we check bitmap_uptodate() without locking the buffer, and so if another process is racing with us, it's possible that they will think the bitmap is uptodate even though the read has not completed yet, resulting in inodes and blocks potentially getting allocated more than once if we get really unlucky. Addresses-Google-Bug: 2828254 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-02-07ext4: fold ext4_claim_inode into ext4_new_inodeTheodore Ts'o1-133/+76
The function ext4_claim_inode() is only called by one function, ext4_new_inode(), and by folding the functionality into ext4_new_inode(), we can remove almost 50 lines of code, and put all of the logic of allocating a new inode into a single place. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-01-10Merge branch 'for_linus' into for_linus_mergedTheodore Ts'o10-458/+1025
Conflicts: fs/ext4/ioctl.c
2012-01-10ext4: fix undefined behavior in ext4_fill_flex_info()Xi Wang1-4/+3
Commit 503358ae01b70ce6909d19dd01287093f6b6271c ("ext4: avoid divide by zero when trying to mount a corrupted file system") fixes CVE-2009-4307 by performing a sanity check on s_log_groups_per_flex, since it can be set to a bogus value by an attacker. sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; groups_per_flex = 1 << sbi->s_log_groups_per_flex; if (groups_per_flex < 2) { ... } This patch fixes two potential issues in the previous commit. 1) The sanity check might only work on architectures like PowerPC. On x86, 5 bits are used for the shifting amount. That means, given a large s_log_groups_per_flex value like 36, groups_per_flex = 1 << 36 is essentially 1 << 4 = 16, rather than 0. This will bypass the check, leaving s_log_groups_per_flex and groups_per_flex inconsistent. 2) The sanity check relies on undefined behavior, i.e., oversized shift. A standard-confirming C compiler could rewrite the check in unexpected ways. Consider the following equivalent form, assuming groups_per_flex is unsigned for simplicity. groups_per_flex = 1 << sbi->s_log_groups_per_flex; if (groups_per_flex == 0 || groups_per_flex == 1) { We compile the code snippet using Clang 3.0 and GCC 4.6. Clang will completely optimize away the check groups_per_flex == 0, leaving the patched code as vulnerable as the original. GCC keeps the check, but there is no guarantee that future versions will do the same. Signed-off-by: Xi Wang <xi.wang@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
2012-01-10Merge branch 'for-linus' of ↵Linus Torvalds1-5/+8
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: vfs: new helper - d_make_root() dcache: use a dispose list in select_parent ceph: d_alloc_root() may fail ext4: fix failure exits isofs: inode leak on mount failure
2012-01-10ext4: fix failure exitsAl Viro1-5/+8
a) leaking root dentry is bad b) in case of failed ext4_mb_init() we don't want to do ext4_mb_release() c) OTOH, in the same case we *do* want ext4_ext_release() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-10Merge branch 'for_linus' of ↵Linus Torvalds10-10/+5
git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: ext2/3/4: delete unneeded includes of module.h ext{3,4}: Fix potential race when setversion ioctl updates inode udf: Mark LVID buffer as uptodate before marking it dirty ext3: Don't warn from writepage when readonly inode is spotted after error jbd: Remove j_barrier mutex reiserfs: Force inode evictions before umount to avoid crash reiserfs: Fix quota mount option parsing udf: Treat symlink component of type 2 as / udf: Fix deadlock when converting file from in-ICB one to normal one udf: Cleanup calling convention of inode_getblk() ext2: Fix error handling on inode bitmap corruption ext3: Fix error handling on inode bitmap corruption ext3: replace ll_rw_block with other functions ext3: NULL dereference in ext3_evict_inode() jbd: clear revoked flag on buffers before a new transaction started ext3: call ext3_mark_recovery_complete() when recovery is really needed
2012-01-09ext2/3/4: delete unneeded includes of module.hPaul Gortmaker9-9/+0
Delete any instances of include module.h that were not strictly required. In the case of ext2, the declaration of MODULE_LICENSE etc. were in inode.c but the module_init/exit were in super.c, so relocate the MODULE_LICENCE/AUTHOR block to super.c which makes it consistent with ext3 and ext4 at the same time. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Jan Kara <jack@suse.cz>
2012-01-09ext{3,4}: Fix potential race when setversion ioctl updates inodeDjalal Harouni1-1/+5
The EXT{3,4}_IOC_SETVERSION ioctl() updates i_ctime and i_generation without i_mutex. This can lead to a race with the other operations that update i_ctime. This is not a big issue but let's make the ioctl consistent with how we handle e.g. other timestamp updates and use i_mutex to protect inode changes. Signed-off-by: Djalal Harouni <tixxdz@opendz.org> Signed-off-by: Jan Kara <jack@suse.cz>
2012-01-09ext[34]: avoid i_nlink warnings triggered by drop_nlink/inc_nlink kludge in ↵Al Viro1-1/+1
symlink() Both ext3 and ext4 put the half-created symlink inode into the orphan list for a while (see the comment in ext[34]_symlink() for gory details). Then, if everything went fine, they pull it out of the orphan list and bump the link count back to 1. The thing is, inc_nlink() is going to complain about seeing somebody changing i_nlink from 0 to 1. With a good reason, since normally something like that is a bug. Explicit set_nlink(inode, 1) does the same thing as inc_nlink() here, but it does *not* complain - exactly because it should be usable in strange situations like this one. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-09Merge branch 'for-linus' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (53 commits) Kconfig: acpi: Fix typo in comment. misc latin1 to utf8 conversions devres: Fix a typo in devm_kfree comment btrfs: free-space-cache.c: remove extra semicolon. fat: Spelling s/obsolate/obsolete/g SCSI, pmcraid: Fix spelling error in a pmcraid_err() call tools/power turbostat: update fields in manpage mac80211: drop spelling fix types.h: fix comment spelling for 'architectures' typo fixes: aera -> area, exntension -> extension devices.txt: Fix typo of 'VMware'. sis900: Fix enum typo 'sis900_rx_bufer_status' decompress_bunzip2: remove invalid vi modeline treewide: Fix comment and string typo 'bufer' hyper-v: Update MAINTAINERS treewide: Fix typos in various parts of the kernel, and fix some comments. clockevents: drop unknown Kconfig symbol GENERIC_CLOCKEVENTS_MIGR gpio: Kconfig: drop unknown symbol 'CS5535_GPIO' leds: Kconfig: Fix typo 'D2NET_V2' sound: Kconfig: drop unknown symbol ARCH_CLPS7500 ... Fix up trivial conflicts in arch/powerpc/platforms/40x/Kconfig (some new kconfig additions, close to removed commented-out old ones)
2012-01-09Merge branch 'pm-for-linus' of ↵Linus Torvalds1-2/+1
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm * 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (76 commits) PM / Hibernate: Implement compat_ioctl for /dev/snapshot PM / Freezer: fix return value of freezable_schedule_timeout_killable() PM / shmobile: Allow the A4R domain to be turned off at run time PM / input / touchscreen: Make st1232 use device PM QoS constraints PM / QoS: Introduce dev_pm_qos_add_ancestor_request() PM / shmobile: Remove the stay_on flag from SH7372's PM domains PM / shmobile: Don't include SH7372's INTCS in syscore suspend/resume PM / shmobile: Add support for the sh7372 A4S power domain / sleep mode PM: Drop generic_subsys_pm_ops PM / Sleep: Remove forward-only callbacks from AMBA bus type PM / Sleep: Remove forward-only callbacks from platform bus type PM: Run the driver callback directly if the subsystem one is not there PM / Sleep: Make pm_op() and pm_noirq_op() return callback pointers PM/Devfreq: Add Exynos4-bus device DVFS driver for Exynos4210/4212/4412. PM / Sleep: Merge internal functions in generic_ops.c PM / Sleep: Simplify generic system suspend callbacks PM / Hibernate: Remove deprecated hibernation snapshot ioctls PM / Sleep: Fix freezer failures due to racy usermodehelper_is_disabled() ARM: S3C64XX: Implement basic power domain support PM / shmobile: Use common always on power domain governor ... Fix up trivial conflict in fs/xfs/xfs_buf.c due to removal of unused XBT_FORCE_SLEEP bit
2012-01-07vfs: switch ->show_options() to struct dentry *Al Viro1-2/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-07vfs: prefer ->dentry->d_sb to ->mnt->mnt_sbAl Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-05ext4: make more symbols staticEric Sandeen3-7/+7
A couple more functions can reasonably be made static if desired. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-01-05ext4: make local symbol ext4_initxattrs staticDjalal Harouni1-2/+3
The ext4_initxattrs symbol is used only in this file, so it should be declared static. Signed-off-by: Djalal Harouni <tixxdz@opendz.org> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-01-05ext4: reserve new feature flag codepointsTheodore Ts'o1-0/+3
Reserve the ext4 features flags EXT4_FEATURE_RO_COMPAT_METADATA_CSUM, EXT4_FEATURE_INCOMPAT_INLINEDATA, and EXT4_FEATURE_INCOMPAT_LARGEDIR. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-01-05ext4: Report max_batch_time option correctlyBen Hutchings1-1/+1
Currently the value reported for max_batch_time is really the value of min_batch_time. Reported-by: Russell Coker <russell@coker.com.au> Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
2012-01-05ext4: add missing ext4_resize_end on error pathsDjalal Harouni1-10/+18
Online resize ioctls 'EXT4_IOC_GROUP_EXTEND' and 'EXT4_IOC_GROUP_ADD' call ext4_resize_begin() to check permissions and to set the EXT4_RESIZING bit lock, they do their work and they must finish with ext4_resize_end() which calls clear_bit_unlock() to unlock and to avoid -EBUSY errors for the next resize operations. This patch adds the missing ext4_resize_end() calls on error paths. Patch tested. Cc: stable@vger.kernel.org Signed-off-by: Djalal Harouni <tixxdz@opendz.org> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-01-05ext4: let ext4_group_add() use common codeYongqiang Yang1-299/+10
This patch lets ext4_group_add() call ext4_flex_group_add(). Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-01-05ext4: let ext4_group_extend() use common codeYongqiang Yang1-39/+2
ext4_group_extend_no_check() is moved out from ext4_group_extend(), this patch lets ext4_group_extend() call ext4_group_extentd_no_check() instead. Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-01-05ext4: add new online resize interfaceYongqiang Yang3-0/+236
This patch adds new online resize interface, whose input argument is a 64-bit integer indicating how many blocks there are in the resized fs. In new resize impelmentation, all work like allocating group tables are done by kernel side, so the new resize interface can support flex_bg feature and prepares ground for suppoting resize with features like bigalloc and exclude bitmap. Besides these, user-space tools just passes in the new number of blocks. We delay initializing the bitmaps and inode tables of added groups if possible and add multi groups (a flex groups) each time, so new resize is very fast like mkfs. Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-01-04ext4: add a new function which adds a flex group to a fsYongqiang Yang1-0/+82
This patch adds a new function named ext4_flex_group_add() which adds a flex group to a fs. The function is used by 64bit-resize interface. Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-01-04ext4: add a new function which allocates bitmaps and inode tablesYongqiang Yang1-0/+111
This patch adds a new function named ext4_allocates_group_table() which allocates block bitmaps, inode bitmaps and inode tables for a flex groups and is used by resize code. Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-01-04ext4: pass verify_reserved_gdb() the number of group decriptorsYongqiang Yang1-3/+4
The 64bit resizer adds a flex group each time, so verify_reserved_gdb can not use s_groups_count directly, it should use the number of group decriptors before the added group. Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-01-04ext4: add a function which updates the super block during online resizingYongqiang Yang1-0/+94
This patch adds a function named ext4_update_super() which updates super block so the newly created block groups are visible to the file system. This code is copied from ext4_group_add(). The function will be used by new resize implementation. Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-01-04ext4: add a function which sets up a block group descriptors of a flex bgYongqiang Yang1-0/+56
This patch adds a function named ext4_setup_new_descs which sets up the block group descriptors of a flex bg. Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-01-04ext4: add a function which sets up group blocks of a flex bgYongqiang Yang2-0/+258
This patch adds a function named setup_new_flex_group_blocks() which sets up group blocks of a flex bg. Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-01-04ext4: add a structure which will be used by 64bit-resize interfaceYongqiang Yang1-0/+55
This patch adds a structure which will be used by 64bit-resize interface. Two functions which allocate and destroy the structure respectively are added. Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-01-04ext4: add a function which adds a new group descriptors to a fsYongqiang Yang1-0/+46
This patch adds a function named ext4_add_new_descs() which adds one or more new group descriptors to a fs and whose code is copied from ext4_group_add(). The function will be used by new resize implementation. Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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