- 07 2月, 2008 1 次提交
-
-
由 Akinobu Mita 提交于
Use ext[234]_get_group_desc() to get group descriptor from group number. Cc: <linux-ext4@vger.kernel.org> Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
- 29 1月, 2008 20 次提交
-
-
由 Aneesh Kumar K.V 提交于
sb_set_blocksize validates whether the specfied block size can be used by the file system. Make sure we fail mounting the file system if the blocksize specfied cannot be used. Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NMingming Cao <cmm@us.ibm.com>
-
由 Miklos Szeredi 提交于
Add stripe= option to /proc/mounts for ext4 filesystems. Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz> Signed-off-by: NMingming Cao <cmm@us.ibm.com>
-
由 Aneesh Kumar K.V 提交于
Enable the multiblock allocator by default. Fix ext4_show_options() so if it is not enabled, the nomballoc option included in /proc/mounts. Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: NEric Sandeen <sandeen@redhat.com> Signed-off-by: NMingming Cao <cmm@us.ibm.com> Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
-
由 Alex Tomas 提交于
Signed-off-by: NAlex Tomas <alex@clusterfs.com> Signed-off-by: NAndreas Dilger <adilger@clusterfs.com> Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NEric Sandeen <sandeen@redhat.com> Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
-
由 Aneesh Kumar K.V 提交于
We need to look at the default value and make sure the mount options are not set via default value before showing them via ext4_show_options Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
-
由 Jean Noel Cordenner 提交于
This patch adds 64-bit inode version support to ext4. The lower 32 bits are stored in the osd1.linux1.l_i_version field while the high 32 bits are stored in the i_version_hi field newly created in the ext4_inode. This field is incremented in case the ext4_inode is large enough. A i_version mount option has been added to enable the feature. Signed-off-by: NMingming Cao <cmm@us.ibm.com> Signed-off-by: NAndreas Dilger <adilger@clusterfs.com> Signed-off-by: NKalpak Shah <kalpak@clusterfs.com> Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NJean Noel Cordenner <jean-noel.cordenner@bull.net>
-
由 Girish Shilamkar 提交于
The journal checksum feature adds two new flags i.e JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT and JBD2_FEATURE_COMPAT_CHECKSUM. JBD2_FEATURE_CHECKSUM flag indicates that the commit block contains the checksum for the blocks described by the descriptor blocks. Due to checksums, writing of the commit record no longer needs to be synchronous. Now commit record can be sent to disk without waiting for descriptor blocks to be written to disk. This behavior is controlled using JBD2_FEATURE_ASYNC_COMMIT flag. Older kernels/e2fsck should not be able to recover the journal with _ASYNC_COMMIT hence it is made incompat. The commit header has been extended to hold the checksum along with the type of the checksum. For recovery in pass scan checksums are verified to ensure the sanity and completeness(in case of _ASYNC_COMMIT) of every transaction. Signed-off-by: NAndreas Dilger <adilger@clusterfs.com> Signed-off-by: NGirish Shilamkar <girish@clusterfs.com> Signed-off-by: NDave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: NMingming Cao <cmm@us.ibm.com>
-
由 Aneesh Kumar K.V 提交于
We are currently taking the truncate_mutex for every read. This would have performance impact on large CPU configuration. Convert the lock to read write semaphore and take read lock when we are trying to read the file. Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
-
由 Aneesh Kumar K.V 提交于
ext4 file system was by default ignoring errors and continuing. This is not a good default as continuing on error could lead to file system corruption. Change the default to mark the file system readonly. Debian and ubuntu already does this as the default in their fstab. Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: NEric Sandeen <sandeen@redhat.com> Signed-off-by: NMingming Cao <cmm@us.ibm.com>
-
由 Eric Sandeen 提交于
When mounting an ext4 filesystem with corrupted s_first_data_block, things can go very wrong and oops. Because blocks_count in ext4_fill_super is a u64, and we must use do_div, the calculation of db_count is done differently than on ext4. If first_data_block is corrupted such that it is larger than ext4_blocks_count, for example, then the intermediate blocks_count value may go negative, but sign-extend to a very large value: blocks_count = (ext4_blocks_count(es) - le32_to_cpu(es->s_first_data_block) + EXT4_BLOCKS_PER_GROUP(sb) - 1); This is then assigned to s_groups_count which is an unsigned long: sbi->s_groups_count = blocks_count; This may result in a value of 0xFFFFFFFF which is then used to compute db_count: db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / EXT4_DESC_PER_BLOCK(sb); and in this case db_count will wind up as 0 because the addition overflows 32 bits. This in turn causes the kmalloc for group_desc to be of 0 size: sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), GFP_KERNEL); and eventually in ext4_check_descriptors, dereferencing sbi->s_group_desc[desc_block] will result in a NULL pointer dereference. The simplest test seems to be to sanity check s_first_data_block, EXT4_BLOCKS_PER_GROUP, and ext4_blocks_count values to be sure their combination won't result in a bad intermediate value for blocks_count. We could just check for db_count == 0, but catching it at the root cause seems like it provides more info. Signed-off-by: NEric Sandeen <sandeen@redhat.com> Reviewed-by: NMingming Cao <cmm@us.ibm.com>
-
由 Adrian Bunk 提交于
Based on a report by Robert P. J. Day. Signed-off-by: NAdrian Bunk <bunk@kernel.org>
-
由 Eric Sandeen 提交于
Calculate & store the max offset for bitmapped files, and catch too-large seeks, truncates, and writes in ext4, shortening or rejecting as appropriate. Signed-off-by: NEric Sandeen <sandeen@redhat.com>
-
由 Eric Sandeen 提交于
use 2 different maxbytes functions for bitmapped & extent-based files. Signed-off-by: NEric Sandeen <sandeen@redhat.com>
-
由 Aneesh Kumar K.V 提交于
This patch converts ext4_inode i_blocks to represent total blocks occupied by the inode in file system block size. Earlier the variable used to represent this in 512 byte block size. This actually limited the total size of the file. The feature is enabled transparently when we write an inode whose i_blocks cannot be represnted as 512 byte units in a 48 bit variable. inode flag EXT4_HUGE_FILE_FL Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
-
由 Aneesh Kumar K.V 提交于
Use the __le16 l_i_reserved1 field of the linux2 struct of ext4_inode to represet the higher 16 bits for i_blocks. With this change max_file size becomes (2**48 -1 )* 512 bytes. We add a RO_COMPAT feature to the super block to indicate that inode have i_blocks represented as a split 48 bits. Super block with this feature set cannot be mounted read write on a kernel with CONFIG_LSF disabled. Super block flag EXT4_FEATURE_RO_COMPAT_HUGE_FILE Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
-
由 Aneesh Kumar K.V 提交于
Fix sparse warnings related to static functions and local variables. Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
-
由 Aneesh Kumar K.V 提交于
Introduce ext4_update_*_feature and use them instead of opencoding. Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
-
由 Avantika Mathur 提交于
In many places variables for block group are of type int, which limits the maximum number of block groups to 2^31. Each block group can have up to 2^15 blocks, with a 4K block size, and the max filesystem size is limited to 2^31 * (2^15 * 2^12) = 2^58 -- or 256 PB This patch introduces a new type ext4_group_t, of type unsigned long, to represent block group numbers in ext4. All occurrences of block group variables are converted to type ext4_group_t. Signed-off-by: NAvantika Mathur <mathur@us.ibm.com>
-
由 Aneesh Kumar K.V 提交于
This patch adds a new data type ext4_lblk_t to represent the logical file blocks. This is the preparatory patch to support large files in ext4 The follow up patch with convert the ext4_inode i_blocks to represent the number of blocks in file system block size. This changes makes it possible to have a block number 2**32 -1 which will result in overflow if the block number is represented by signed long. This patch convert all the block number to type ext4_lblk_t which is typedef to __u32 Also remove dead code ext4_ext_walk_space Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NMingming Cao <cmm@us.ibm.com> Signed-off-by: NEric Sandeen <sandeen@redhat.com>
-
由 Takashi Sato 提交于
This patch set supports large block size(>4k, <=64k) in ext4, just enlarging the block size limit. But it is NOT possible to have 64kB blocksize on ext4 without some changes to the directory handling code. The reason is that an empty 64kB directory block would have a rec_len == (__u16)2^16 == 0, and this would cause an error to be hit in the filesystem. The proposed solution is treat 64k rec_len with a an impossible value like rec_len = 0xffff to handle this. The Patch-set consists of the following 2 patches. [1/2] ext4: enlarge blocksize - Allow blocksize up to pagesize [2/2] ext4: fix rec_len overflow - prevent rec_len from overflow with 64KB blocksize Now on 64k page ppc64 box runs with this patch set we could create a 64k block size ext4dev, and able to handle empty directory block. Signed-off-by: NTakashi Sato <sho@tnes.nec.co.jp> Signed-off-by: NMingming Cao <cmm@us.ibm.com>
-
- 18 12月, 2007 1 次提交
-
-
由 Andries E. Brouwer 提交于
As it turns out, the kernel divides by EXT3_INODES_PER_GROUP(s) when mounting an ext3 filesystem. If that number is zero, a crash follows. Below a patch. This crash was reported by Joeri de Ruiter, Carst Tankink and Pim Vullers. Cc: <linux-ext4@vger.kernel.org> Acked-by: NAlan Cox <alan@redhat.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
- 22 10月, 2007 2 次提交
-
-
由 Christoph Hellwig 提交于
Now that nfsd has stopped writing to the find_exported_dentry member we an mark the export_operations const Signed-off-by: NChristoph Hellwig <hch@lst.de> Cc: Neil Brown <neilb@suse.de> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: <linux-ext4@vger.kernel.org> Cc: Dave Kleikamp <shaggy@austin.ibm.com> Cc: Anton Altaparmakov <aia21@cantab.net> Cc: David Chinner <dgc@sgi.com> Cc: Timothy Shimmin <tes@sgi.com> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: Hugh Dickins <hugh@veritas.com> Cc: Chris Mason <mason@suse.com> Cc: Jeff Mahoney <jeffm@suse.com> Cc: "Vladimir V. Saveliev" <vs@namesys.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Mark Fasheh <mark.fasheh@oracle.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
由 Christoph Hellwig 提交于
Trivial switch over to the new generic helpers. Signed-off-by: NChristoph Hellwig <hch@lst.de> Cc: Neil Brown <neilb@suse.de> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
- 18 10月, 2007 8 次提交
-
-
由 Aneesh Kumar K.V 提交于
Convert s_r_blocks_count and s_free_blocks_count to s_r_blocks_count_lo and s_free_blocks_count_lo This helps in finding BUGs due to direct partial access of these split 64 bit values Also fix direct partial access in ext4 code Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
-
由 Aneesh Kumar K.V 提交于
Convert s_blocks_count to s_blocks_count_lo This helps in finding BUGs due to direct partial access of these split 64 bit values Also fix direct partial access in ext4 code Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
-
由 Aneesh Kumar K.V 提交于
Convert bg_inode_bitmap and bg_inode_table to bg_inode_bitmap_lo and bg_inode_table_lo. This helps in finding BUGs due to direct partial access of these split 64 bit values Also fix one direct partial access Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
-
由 Aneesh Kumar K.V 提交于
Convert bg_block_bitmap to bg_block_bitmap_lo This helps in catching some BUGS due to direct partial access of these split fields. Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
-
由 Jose R. Santos 提交于
This feature relaxes check restrictions on where each block groups meta data is located within the storage media. This allows for the allocation of bitmaps or inode tables outside the block group boundaries in cases where bad blocks forces us to look for new blocks which the owning block group can not satisfy. This will also allow for new meta-data allocation schemes to improve performance and scalability. Signed-off-by: NJose R. Santos <jrs@us.ibm.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
-
由 Andreas Dilger 提交于
In pass1 of e2fsck, every inode table in the fileystem is scanned and checked, regardless of whether it is in use. This is this the most time consuming part of the filesystem check. The unintialized block group feature can greatly reduce e2fsck time by eliminating checking of uninitialized inodes. With this feature, there is a a high water mark of used inodes for each block group. Block and inode bitmaps can be uninitialized on disk via a flag in the group descriptor to avoid reading or scanning them at e2fsck time. A checksum of each group descriptor is used to ensure that corruption in the group descriptor's bit flags does not cause incorrect operation. The feature is enabled through a mkfs option mke2fs /dev/ -O uninit_groups A patch adding support for uninitialized block groups to e2fsprogs tools has been posted to the linux-ext4 mailing list. The patches have been stress tested with fsstress and fsx. In performance tests testing e2fsck time, we have seen that e2fsck time on ext3 grows linearly with the total number of inodes in the filesytem. In ext4 with the uninitialized block groups feature, the e2fsck time is constant, based solely on the number of used inodes rather than the total inode count. Since typical ext4 filesystems only use 1-10% of their inodes, this feature can greatly reduce e2fsck time for users. With performance improvement of 2-20 times, depending on how full the filesystem is. The attached graph shows the major improvements in e2fsck times in filesystems with a large total inode count, but few inodes in use. In each group descriptor if we have EXT4_BG_INODE_UNINIT set in bg_flags: Inode table is not initialized/used in this group. So we can skip the consistency check during fsck. EXT4_BG_BLOCK_UNINIT set in bg_flags: No block in the group is used. So we can skip the block bitmap verification for this group. We also add two new fields to group descriptor as a part of uninitialized group patch. __le16 bg_itable_unused; /* Unused inodes count */ __le16 bg_checksum; /* crc16(sb_uuid+group+desc) */ bg_itable_unused: If we have EXT4_BG_INODE_UNINIT not set in bg_flags then bg_itable_unused will give the offset within the inode table till the inodes are used. This can be used by fsck to skip list of inodes that are marked unused. bg_checksum: Now that we depend on bg_flags and bg_itable_unused to determine the block and inode usage, we need to make sure group descriptor is not corrupt. We add checksum to group descriptor to detect corruption. If the descriptor is found to be corrupt, we mark all the blocks and inodes in the group used. Signed-off-by: NAvantika Mathur <mathur@us.ibm.com> Signed-off-by: NAndreas Dilger <adilger@clusterfs.com> Signed-off-by: NMingming Cao <cmm@us.ibm.com> Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
-
由 Coly Li 提交于
Fragment support in ext2/3/4 was never implemented, and it probably will never be implemented. So remove it from ext4. Signed-off-by: NColy Li <coyli@suse.de> Acked-by: NAndreas Dilger <adilger@clusterfs.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
-
由 Mingming Cao 提交于
change JBD_XXX macros to JBD2_XXX in JBD2/Ext4 Signed-off-by: NMingming Cao <cmm@us.ibm.com> Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
-
- 17 10月, 2007 6 次提交
-
-
由 vignesh babu 提交于
Replace n & (n - 1) with is_power_of_2(n) Signed-off-by: Nvignesh babu <vignesh.babu@wipro.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
由 Miklos Szeredi 提交于
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
由 Fengguang Wu 提交于
It's *wrong* to have #define log2(n) ffz(~(n)) It should be *reversed*: #define log2(n) flz(~(n)) or #define log2(n) fls(n) or just use ilog2(n) defined in linux/log2.h. This patch follows the last solution, recommended by Andrew Morton. Cc: <linux-ext4@vger.kernel.org> Cc: Mingming Cao <cmm@us.ibm.com> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Chris Ahna <christopher.j.ahna@intel.com> Cc: David Mosberger-Tang <davidm@hpl.hp.com> Cc: Kyle McMartin <kyle@parisc-linux.org> Cc: Dave Airlie <airlied@linux.ie> Cc: Dave Jones <davej@codemonkey.org.uk> Signed-off-by: NFengguang Wu <wfg@mail.ustc.edu.cn> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
由 Christoph Lameter 提交于
Slab constructors currently have a flags parameter that is never used. And the order of the arguments is opposite to other slab functions. The object pointer is placed before the kmem_cache pointer. Convert ctor(void *object, struct kmem_cache *s, unsigned long flags) to ctor(struct kmem_cache *s, void *object) throughout the kernel [akpm@linux-foundation.org: coupla fixes] Signed-off-by: NChristoph Lameter <clameter@sgi.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
由 Peter Zijlstra 提交于
alloc_percpu can fail, propagate that error. Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
由 Peter Zijlstra 提交于
s/percpu_counter_sum/&_positive/ Because its consitent with percpu_counter_read* Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
- 12 9月, 2007 1 次提交
-
-
由 Jan Kara 提交于
If we fail to start a transaction when releasing dquot, we have to call dquot_release() anyway to mark dquot structure as inactive. Otherwise we end in an infinite loop inside dqput(). Signed-off-by: NJan Kara <jack@suse.cz> Cc: xb <xavier.bru@bull.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
- 27 7月, 2007 1 次提交
-
-
由 Eric Sandeen 提交于
ext[234]_check_descriptors sanity checks block group descriptor geometry at mount time, testing whether the block bitmap, inode bitmap, and inode table reside wholly within the blockgroup. However, the inode table test is off by one so that if the last block in the inode table resides on the last block of the block group, the test incorrectly fails. This is because it tests the last block as (start + length) rather than (start + length - 1). This can be seen by trying to mount a filesystem made such as: mkfs.ext2 -F -b 1024 -m 0 -g 256 -N 3744 fsfile 1024 which yields: EXT2-fs error (device loop0): ext2_check_descriptors: Inode table for group 0 not in group (block 101)! EXT2-fs: group descriptors corrupted! There is a similar bug in e2fsprogs, patch already sent for that. (I wonder if inside(), outside(), and/or in_range() should someday be used in this and other tests throughout the ext filesystems...) Signed-off-by: NEric Sandeen <sandeen@redhat.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-