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/fs/ntfs3/lib/
A Ddecompress_common.h76 is->bitbuf = 0; in init_input_bitstream()
79 is->end = is->next + size; in init_input_bitstream()
91 if (is->end - is->next >= 2) { in bitstream_ensure_bits()
92 is->bitbuf |= (u32)get_unaligned_le16(is->next) in bitstream_ensure_bits()
94 is->next += 2; in bitstream_ensure_bits()
146 if (unlikely(is->end == is->next)) in bitstream_read_byte()
157 if (unlikely(is->end - is->next < 2)) in bitstream_read_u16()
160 is->next += 2; in bitstream_read_u16()
170 if (unlikely(is->end - is->next < 4)) in bitstream_read_u32()
173 is->next += 4; in bitstream_read_u32()
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A Dlzx_decompress.c208 struct input_bitstream *is) in read_presym() argument
224 struct input_bitstream *is) in read_lensym() argument
285 presym = read_presym(d, is); in lzx_read_codeword_lens()
355 bitstream_ensure_bits(is, 4); in lzx_read_block_header()
381 bitstream_read_bits(is, in lzx_read_block_header()
447 bitstream_ensure_bits(is, 1); in lzx_read_block_header()
448 bitstream_align(is); in lzx_read_block_header()
472 struct input_bitstream *is, in lzx_decompress_block() argument
597 struct input_bitstream is; in lzx_decompress() local
625 &is, in lzx_decompress()
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A Dxpress_decompress.c66 struct input_bitstream is; in xpress_decompress() local
86 init_input_bitstream(&is, in_begin + XPRESS_NUM_SYMBOLS / 2, in xpress_decompress()
95 sym = read_huffsym(&is, d->decode_table, in xpress_decompress()
105 bitstream_ensure_bits(&is, 16); in xpress_decompress()
108 bitstream_pop_bits(&is, log2_offset); in xpress_decompress()
111 length += bitstream_read_byte(&is); in xpress_decompress()
113 length = bitstream_read_u16(&is); in xpress_decompress()
/fs/cramfs/
A DREADME7 a given directory are contiguous, as this is used by readdir).
9 All data is currently in host-endian format; neither mkcramfs nor the
22 Filename. Not generally null-terminated, but it is
61 aligned to a 4-byte boundary. The block size is either blksize
62 if CRAMFS_BLK_FLAG_UNCOMPRESSED is also specified, otherwise
63 the compressed data length is included in the first 2 bytes of
76 otherwise it is the input data directly.
85 If CRAMFS_BLK_FLAG_UNCOMPRESSED is also specified then the size is always
131 One option is to change mkcramfs to take its PAGE_SIZE from
137 PAGE_SIZE is subject to change between kernel versions
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A DKconfig7 System). CramFs is designed to be a simple, small, and compressed
8 file system for ROM based embedded systems. CramFs is read-only,
19 This filesystem is limited in capabilities and performance on
20 purpose to remain small and low on RAM usage. It is most suitable
23 which is much better in terms of performance and features.
43 This saves some memory since no intermediate buffering is
46 The location of the CramFs image is determined by a
/fs/overlayfs/
A DKconfig9 object in the 'upper' filesystem is visible while the object in the
10 'lower' filesystem is either hidden or, in the case of directories,
19 If this config option is enabled then overlay filesystems will use
20 redirects when renaming directories by default. In this case it is
39 If backward compatibility is not an issue, then it is safe and
59 Note, that the inodes index feature is not backward compatible.
84 Note, that the NFS export feature is not backward compatible.
105 issue, then it is safe and recommended to say Y here.
116 If this config option is enabled then overlay filesystems will
118 happen when a file is opened for WRITE operation. It is still
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/fs/ext4/
A Dinline.c166 if (!is.s.not_found) { in ext4_find_inline_data_nolock()
179 brelse(is.iloc.bh); in ext4_find_inline_data_nolock()
328 get_bh(is.iloc.bh); in ext4_create_inline_data()
332 brelse(is.iloc.bh); in ext4_create_inline_data()
361 if (is.s.not_found) { in ext4_update_inline_data()
398 get_bh(is.iloc.bh); in ext4_update_inline_data()
403 brelse(is.iloc.bh); in ext4_update_inline_data()
480 get_bh(is.iloc.bh); in ext4_destroy_inline_data_nolock()
487 brelse(is.iloc.bh); in ext4_destroy_inline_data_nolock()
1627 brelse(is.iloc.bh); in ext4_find_inline_entry()
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A DKconfig9 This config option is here only for backward compatibility. ext3
10 filesystem is now handled by the ext4 driver.
18 This config option is here only for backward compatibility. ext3
19 filesystem is now handled by the ext4 driver.
26 This config option is here only for backward compatibility. ext3
27 filesystem is now handled by the ext4 driver.
38 This is the next generation of the ext3 filesystem.
41 the on-disk format of ext4 is not forwards compatible with
42 ext3; it is based on extent maps and it supports 48-bit
/fs/jffs2/
A DREADME.Locking6 JFFS2. It is not expected to remain perfectly up to date, but ought to
13 The alloc_sem is a per-filesystem mutex, used primarily to ensure
14 contiguous allocation of space on the medium. It is automatically
35 if the wbuf is currently holding any data is permitted, though.
43 This is the JFFS2-internal equivalent of the inode mutex i->i_sem.
48 The reason that the i_sem itself isn't used for this purpose is to
59 mutex, which is obtained by the garbage collection code and also
74 This is used to serialise access to the eraseblock lists, to the
90 long as the pointer you're holding is to a _valid_ node, not an
93 The erase_completion_lock is also used to protect the c->gc_task
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/fs/xfs/
A DKconfig9 XFS is a high performance journaling filesystem which originated
10 on the SGI IRIX platform. It is completely multi-threaded, can
12 variable block sizes, is extent based, and makes extensive use of
17 for complete details. This implementation is on-disk compatible
39 beginning with "crc=". If the string "crc=0" is found, the
40 filesystem is a V4 filesystem. If no such string is found, please
67 filesystem is a case-insensitive filesystem. If no such string is
147 mounted XFS filesystem. This feature is intended to reduce
149 advantage here is to look for problems proactively so that
152 This feature is considered EXPERIMENTAL. Use with caution!
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/fs/affs/
A DChanges11 in readdir()) gives compiler warnings but is
24 - When a file is truncated to a size that is not
26 last allocated block is not cleared. Well,
138 - One set of dentry callbacks is enough. (BH)
144 - The original blocksize of the device is
145 restored when the fs is unmounted. (BH)
242 name buffer. It is now silently truncated to
244 is too embarrassing.)
253 - fsuser is now checked last.
263 demand instead of when a file is opened, as
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/fs/ntfs3/
A DKconfig12 File system type to use on mount is "ntfs3". Module name (M option)
13 is also "ntfs3".
25 It is recommended to say N here.
35 It is recommended to say Y here.
46 NOTE: this is linux only feature. Windows will ignore these ACLs.
56 This config option is here only for backward compatibility. NTFS
57 filesystem is now handled by the NTFS3 driver.
/fs/befs/
A DChangeLog34 This is bad, since 2.4.9 is still the current RedHat kernel. I added
51 finding the first key that is a substring of the string it is searching
102 The option is, simply enough, 'debug'.
151 the page size in linux, which is 4k i386. Oops. Added a test for
167 superblock type, rather than struct super_block. This is for
171 is the new way. (inode.c, super.c) [WD]
186 include/linux/fs.h. Also, befs_inode_info is huge (because of the
190 is done being read. (datastream.c) [WD]
229 * Generic_read_file() is now used to read regular file data.
316 inode, it is the number of blocks for the file. Also, i_blksize is not
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/fs/ubifs/
A DKconfig18 UBIFS is a file system for flash devices which works on top of UBI.
35 LZO compressor is generally faster than zlib but compresses worse.
42 Zlib compresses better than LZO but it is slower. Say 'Y' if unsure.
49 ZSTD compresses is a big win in speed over Zlib and
57 increased flash wear. This option adds atime support and it is disabled by default
61 so be careful. How often atime is updated depends on the selected strategy:
62 strictatime is the "heavy", relatime is "lighter", etc.
/fs/ocfs2/
A DKconfig13 OCFS2 is a general purpose extent based shared disk cluster file
36 O2CB is limited to maintaining a cluster for OCFS2 file systems.
39 It is always safe to say Y here, as the clustering method is
51 It is safe to say Y, as the clustering method is run-time
78 this option for debugging only as it is likely to decrease
/fs/configfs/
A DKconfig5 configfs is a RAM-based filesystem that provides the converse
6 of sysfs's functionality. Where sysfs is a filesystem-based
7 view of kernel objects, configfs is a filesystem-based manager
11 same system. One is not a replacement for the other.
/fs/isofs/
A DKconfig6 This is the standard file system used on CD-ROMs. It was previously
7 known as "High Sierra File System" and is called "hsfs" on other
24 Joliet is a Microsoft extension for the ISO 9660 CD-ROM file system
25 which allows for long filenames in unicode format (unicode is the
36 This is a Linux-specific extension to RockRidge which lets you store
38 decompressed when the CD-ROM is accessed. See
/fs/pstore/
A DKconfig32 the backing store. This is implemented using the zlib 'deflate'
35 problems while pstore is recording panic metadata.
41 When the option is enabled, pstore will log all kernel
49 When the option is enabled, pstore will export a character
118 4) /dev/<disk_name>p<decimal> - same as the above, this form is
123 partition using the format SSSSSSSS-PP, where SSSSSSSS is a zero-
140 pstore/blk. The size is in KB and must be a multiple of 4.
150 The maximum reason for kmsg dumps to store. The default is
163 This just sets size of pmsg (pmsg_size) for pstore/blk. The size is
176 pstore/blk. The size is in KB and must be a multiple of 4.
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/fs/freevxfs/
A DKconfig7 FreeVxFS is a file system driver that support the VERITAS VxFS(TM)
8 file system format. VERITAS VxFS(TM) is the standard file system
14 Currently only readonly access is supported and VxFX versions
18 fstab(5) is 'vxfs' as it describes the file system format, not
21 There is a userspace utility for HP-UX logical volumes which makes
/fs/squashfs/
A DKconfig7 Read-Only File System). Squashfs is a highly compressed read-only
16 Squashfs is intended for general read-only filesystem use, for
18 embedded systems where low overhead is needed. Further information
80 default Decompressor parallelisation is SQUASHFS_DECOMP_SINGLE
126 decompression is load-balanced across the cores.
140 The upper limit is num_online_cpus() * 2.
171 memory usage is not a limiting factor. If unsure, say N.
179 ZLIB compression is the standard compression used by Squashfs
192 compressed with LZ4 compression. LZ4 compression is mainly
207 compressed with LZO compression. LZO compression is mainly
[all …]
/fs/gfs2/
A DKconfig13 that is shared between them (with FC, iSCSI, NBD, etc...). GFS reads
16 filesystem consistency is maintained. One of the nifty features of
17 GFS is perfect consistency -- changes made to the filesystem on one
24 The "nolock" lock module is now built in to GFS2 by default. If
35 interface between GFS2 and the DLM, which is required to use GFS2
/fs/udf/
A DKconfig9 This is a file system used on some CD-ROMs and DVDs. Since the
10 file system is supported by multiple operating systems and is more
11 compatible with standard unix file systems, it is also suitable for
/fs/jbd2/
A DKconfig6 This is a generic journaling layer for block devices that support
7 both 32-bit and 64-bit block numbers. It is currently used by
26 allows you to enable debugging output while the system is running,
31 with "echo N > /sys/module/jbd2/parameters/jbd2_debug", where N is a
33 output is generated. To turn debugging off again, do
/fs/ext2/
A DKconfig7 Ext2 is a standard Linux file system for hard disks.
9 This filesystem driver is deprecated because it does not properly
13 The driver is fully compatible, supports filesystems without journal
15 is created with at least 256 byte inodes.
17 This code is kept as a simple reference for filesystem developers.
/fs/notify/fanotify/
A DKconfig8 Say Y here to enable fanotify support. fanotify is a file access
20 Say Y here is you want fanotify listeners to be able to make permissions
21 decisions concerning filesystem events. This is used by some fanotify
23 use those files. This is used by some anti-malware vendors and by some

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