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/fs/xfs/libxfs/
Dxfs_inode_buf.c205 struct xfs_icdinode *to = &ip->i_d; in xfs_inode_from_disk() local
213 to->di_version = from->di_version; in xfs_inode_from_disk()
214 if (to->di_version == 1) { in xfs_inode_from_disk()
216 to->di_projid_lo = 0; in xfs_inode_from_disk()
217 to->di_projid_hi = 0; in xfs_inode_from_disk()
218 to->di_version = 2; in xfs_inode_from_disk()
221 to->di_projid_lo = be16_to_cpu(from->di_projid_lo); in xfs_inode_from_disk()
222 to->di_projid_hi = be16_to_cpu(from->di_projid_hi); in xfs_inode_from_disk()
225 to->di_format = from->di_format; in xfs_inode_from_disk()
226 to->di_uid = be32_to_cpu(from->di_uid); in xfs_inode_from_disk()
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Dxfs_sb.c451 struct xfs_sb *to, in __xfs_sb_from_disk() argument
455 to->sb_magicnum = be32_to_cpu(from->sb_magicnum); in __xfs_sb_from_disk()
456 to->sb_blocksize = be32_to_cpu(from->sb_blocksize); in __xfs_sb_from_disk()
457 to->sb_dblocks = be64_to_cpu(from->sb_dblocks); in __xfs_sb_from_disk()
458 to->sb_rblocks = be64_to_cpu(from->sb_rblocks); in __xfs_sb_from_disk()
459 to->sb_rextents = be64_to_cpu(from->sb_rextents); in __xfs_sb_from_disk()
460 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); in __xfs_sb_from_disk()
461 to->sb_logstart = be64_to_cpu(from->sb_logstart); in __xfs_sb_from_disk()
462 to->sb_rootino = be64_to_cpu(from->sb_rootino); in __xfs_sb_from_disk()
463 to->sb_rbmino = be64_to_cpu(from->sb_rbmino); in __xfs_sb_from_disk()
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Dxfs_da_format.c123 uint8_t *to, in xfs_dir2_sf_put_ino() argument
129 put_unaligned_be64(ino, to); in xfs_dir2_sf_put_ino()
131 put_unaligned_be32(ino, to); in xfs_dir2_sf_put_ino()
434 struct xfs_dir3_icleaf_hdr *to, in xfs_dir2_leaf_hdr_from_disk() argument
437 to->forw = be32_to_cpu(from->hdr.info.forw); in xfs_dir2_leaf_hdr_from_disk()
438 to->back = be32_to_cpu(from->hdr.info.back); in xfs_dir2_leaf_hdr_from_disk()
439 to->magic = be16_to_cpu(from->hdr.info.magic); in xfs_dir2_leaf_hdr_from_disk()
440 to->count = be16_to_cpu(from->hdr.count); in xfs_dir2_leaf_hdr_from_disk()
441 to->stale = be16_to_cpu(from->hdr.stale); in xfs_dir2_leaf_hdr_from_disk()
443 ASSERT(to->magic == XFS_DIR2_LEAF1_MAGIC || in xfs_dir2_leaf_hdr_from_disk()
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/fs/nls/
DKconfig11 as the ability of some filesystems to use native languages
27 system (if different) to store data (filenames) on a disk.
45 in so-called DOS codepages. You need to include the appropriate
46 codepage if you want to be able to read/write these filenames on
47 DOS/Windows partitions correctly. This does apply to the filenames
48 only, not to the file contents. You can include several codepages;
49 say Y here if you want to include the DOS codepage that is used in
57 in so-called DOS codepages. You need to include the appropriate
58 codepage if you want to be able to read/write these filenames on
59 DOS/Windows partitions correctly. This does apply to the filenames
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/fs/reiserfs/
DREADME9 Reiser, or authorized to be licensed by him, have been in the past,
10 and likely will be in the future, licensed to other parties under
11 other licenses. If you add your code to governed files, and don't
12 want it to be owned by Hans Reiser, put your copyright label on that
15 Reiser, and by adding your code to it, widely distributing it to
19 to license code labeled as owned by you on your behalf other than
20 under the GPL, because he wants to know if it is okay to do so and put
21 a check in the mail to you (for non-trivial improvements) when he
22 makes his next sale. He makes no guarantees as to the amount if any,
23 though he feels motivated to motivate contributors, and you can surely
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/fs/jffs2/
DREADME.Locking5 This document attempts to describe the existing locking rules for
6 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
23 have been properly linked into the data structures for the inode to
25 nodes to an inode may obsolete old ones, and by holding the alloc_sem
29 don't actually get erased until the write-buffer has been flushed to
33 the alloc_sem is also used to protect the wbuf-related members of the
34 jffs2_sb_info structure. Atomically reading the wbuf_len member to see
48 The reason that the i_sem itself isn't used for this purpose is to
50 before calling a function which may need to allocate space. The
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DTODO6 do shared writable mmap, if we can have a fs hook for do_wp_page() to
13 mount doesn't have to read the flash twice for large files.
23 - Split writes so they go to two separate blocks rather than just c->nextblock.
24 By writing _new_ nodes to one block, and garbage-collected REF_PRISTINE
25 nodes to a different one, we can separate clean nodes from those which
26 are likely to become dirty, and end up with blocks which are each far
27 closer to 100% or 0% clean, hence speeding up later GC progress dramatically.
29 the full dirent, we only need to go to the flash in lookup() when we think we've
31 - Doubly-linked next_in_ino list to allow us to free obsoleted raw_node_refs immediately?
/fs/xfs/
Dxfs_inode_item.c300 struct xfs_log_dinode *to, in xfs_inode_to_log_dinode() argument
306 to->di_magic = XFS_DINODE_MAGIC; in xfs_inode_to_log_dinode()
308 to->di_version = from->di_version; in xfs_inode_to_log_dinode()
309 to->di_format = from->di_format; in xfs_inode_to_log_dinode()
310 to->di_uid = from->di_uid; in xfs_inode_to_log_dinode()
311 to->di_gid = from->di_gid; in xfs_inode_to_log_dinode()
312 to->di_projid_lo = from->di_projid_lo; in xfs_inode_to_log_dinode()
313 to->di_projid_hi = from->di_projid_hi; in xfs_inode_to_log_dinode()
315 memset(to->di_pad, 0, sizeof(to->di_pad)); in xfs_inode_to_log_dinode()
316 memset(to->di_pad3, 0, sizeof(to->di_pad3)); in xfs_inode_to_log_dinode()
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DKconfig13 Btrees (directories, extents, free space) to aid both performance
16 Refer to the documentation at <http://oss.sgi.com/projects/xfs/>
23 to use an initial ramdisk (initrd) to boot.
30 If you say Y here, you will be able to set limits for disk usage on
32 information as filesystem metadata and uses journaling to provide a
35 filesystem to be migrated between Linux and IRIX without any need
57 If you say Y here you will be able to mount and use XFS filesystems
60 originally designed to provide deterministic data rates suitable
63 separated. Regular file I/Os are isolated to a separate device
65 to applications via the inherit-realtime directory inode flag.
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/fs/cifs/
DKconfig26 to the original dialect, the Server Message Block (SMB) protocol, the
40 for mounting to SMB3 (and CIFS) compliant servers. It includes
49 Note that when mounting to Samba, due to the CIFS POSIX extensions,
52 slightly simpler (compared to CIFS) due to protocol improvements.
54 If you need to mount to Samba, Azure, Macs or Windows from this machine, say Y.
61 request timing to be displayed in /proc/fs/cifs/DebugData and also
62 allow optional logging of slow responses to dmesg (depending on the
93 SMB protocol but LANMAN based authentication is needed to
96 Enabling this option allows the cifs module to mount to older
100 have a need to access old SMB servers (and are on a private
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/fs/sysv/
Dinode.c110 unsigned char * from, unsigned char * to) in read3byte() argument
113 to[0] = from[0]; in read3byte()
114 to[1] = 0; in read3byte()
115 to[2] = from[1]; in read3byte()
116 to[3] = from[2]; in read3byte()
118 to[0] = from[0]; in read3byte()
119 to[1] = from[1]; in read3byte()
120 to[2] = from[2]; in read3byte()
121 to[3] = 0; in read3byte()
123 to[0] = 0; in read3byte()
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/fs/affs/
DChanges14 Alas, I've got no alpha to debug. :-(
20 - The feature to automatically make the fs clean
24 - When a file is truncated to a size that is not
27 this fs never claimed to be Posix conformant.
29 Please direct bug reports to: zippel@linux-m68k.org
45 - change to global min macro + warning fixes
65 - disable link to directories until we can properly support them.
94 - Converted to use 2.3.x page cache [Dave Jones]
100 - Changed partition checker to allow devices
104 word at 0xd0 that Windows likes to write to.
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/fs/befs/
DChangeLog15 Thanks to Laszlo Boszormenyi for pointing this out to me.
19 * Added Sergey S. Kostyliov's patch to eliminate memcpy() overhead
33 wouldn't work on older (<2.4.10) kernels due to an unresolved symbol.
37 * Sergey S. Kostyliov made befs_find_key() use a binary search to find
53 names like file1 and file2 to mysteriously be duplicates of each other
54 (because they have the same inode number). Many thanks to Pavel Roskin
76 * Made functions in endian.h to do the correct byteswapping, no matter
83 * Added byteswapping to all metadata reads from disk.
86 * Remove the typedef of struct super_block to vfs_sb, as it offended
101 * Added mount option to control debug printing.
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/fs/fat/
DKconfig6 If you want to use one of the FAT-based file systems (the MS-DOS and
8 to include FAT support. You will then be able to mount partitions or
14 the foundation for the other file systems. You will have to say Y or
15 M to at least one of "MSDOS fs support" or "VFAT fs support" in
16 order to make use of it.
18 Another way to read and write MSDOS floppies and hard drive
20 mtools ("man mtools") program suite. You don't need to say Y here in
21 order to do that.
23 If you need to move large files on floppies between a DOS and a
34 -- they will have to be modules as well.
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/fs/
DKconfig.binfmt13 systems. Saying Y here will enable your kernel to run ELF binaries
17 to run executables from different architectures or operating systems
20 want to say Y here.
27 you'll have to install the newest ELF runtime libraries, including
46 segments of a binary to be located in memory independently of each
48 MMU is available as it still permits text segments to be shared,
51 It is also possible to run FDPIC ELF binaries on MMU linux also.
68 the first page of the file in a core dump makes it possible to
70 cost and disk space to dump all the text. However, versions of
84 Say Y here if you want to execute interpreted scripts starting with
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Dselect.c273 int poll_select_set_timeout(struct timespec64 *to, time64_t sec, long nsec) in poll_select_set_timeout() argument
282 to->tv_sec = to->tv_nsec = 0; in poll_select_set_timeout()
284 ktime_get_ts64(to); in poll_select_set_timeout()
285 *to = timespec64_add_safe(*to, ts); in poll_select_set_timeout()
478 ktime_t expire, *to = NULL; in do_select() local
598 if (end_time && !to) { in do_select()
600 to = &expire; in do_select()
604 to, slack)) in do_select()
703 struct timespec64 end_time, *to = NULL; in kern_select() local
711 to = &end_time; in kern_select()
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/fs/jfs/
Djfs_unicode.c19 int jfs_strfromUCS_le(char *to, const __le16 * from, in jfs_strfromUCS_le() argument
32 &to[outlen], in jfs_strfromUCS_le()
37 to[outlen++] = '?'; in jfs_strfromUCS_le()
42 to[i] = '?'; in jfs_strfromUCS_le()
55 to[i] = (char) (le16_to_cpu(from[i])); in jfs_strfromUCS_le()
59 to[outlen] = 0; in jfs_strfromUCS_le()
69 static int jfs_strtoUCS(wchar_t * to, const unsigned char *from, int len, in jfs_strtoUCS() argument
78 charlen = codepage->char2uni(from, len, &to[i]); in jfs_strtoUCS()
89 to[i] = (wchar_t) from[i]; in jfs_strtoUCS()
92 to[i] = 0; in jfs_strtoUCS()
/fs/nfsd/
DKconfig13 Choose Y here if you want to allow other computers to access
18 You may choose to use a user-space NFS server instead, in which
21 To export local file systems using NFS, you also need to install
28 available to clients mounting the NFS server on this system.
54 This protocol extension allows applications on NFS clients to
60 NFSv3 ACL protocol extension allowing NFS clients to manipulate
65 To store ACLs on your NFS server, you also need to enable ACL-
83 To export files using NFSv4, you need to install additional user
100 clients to directly perform I/O to block devices accesible to both
114 clients to directly perform I/O to SCSI devices accesible to both
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/fs/cramfs/
DREADME23 null-padded to a multiple of 4 bytes.
25 The order of inode traversal is described as "width-first" (not to be
33 allows cramfs_lookup to return more quickly when a filename does not
44 padding to multiple of 4 bytes
61 aligned to a 4-byte boundary. The block size is either blksize
64 the block data. This is used to allow discontiguous data layout
74 applied to the i'th blksize-sized chunk of the input data if the
99 kernels up to at least 2.3.39 didn't support holes. Run mkcramfs
100 with -z if you want it to create files that can have holes in them.
116 (Block size in cramfs refers to the size of input data that is
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/fs/sysfs/
DKconfig7 The sysfs filesystem is a virtual filesystem that the kernel uses to
9 relationships to one another.
11 Users can use sysfs to ascertain useful information about the running
13 which driver each is bound to. sysfs can also be used to tune devices
16 Some system agents rely on the information in sysfs to operate.
17 /sbin/hotplug uses device and object attributes in sysfs to assist in
20 sysfs is currently used by the block subsystem to mount the root
25 Designers of embedded systems may wish to say N here to conserve space.
/fs/ufs/
DKconfig9 this file system as well. Saying Y here will allow you to read from
10 these partitions; if you also want to write to them, say Y to the
18 good portable way to transport files and directories between unixes
22 When accessing NeXTstep files, you may need to convert them from the
23 NeXT character set to the Latin1 character set; use the program
29 If you haven't heard about all of this before, it's safe to say N.
35 Say Y here if you want to try writing to UFS partitions. This is
43 Y here. This will result in _many_ additional debugging messages to be
44 written to the system log.
/fs/gfs2/
DKconfig12 Allows a cluster of computers to simultaneously use a block device
14 and writes to the block device like a local filesystem, but also uses
15 a lock module to allow the computers coordinate their I/O so
17 GFS is perfect consistency -- changes made to the filesystem on one
20 To use the GFS2 filesystem in a cluster, you will need to enable
24 The "nolock" lock module is now built in to GFS2 by default. If
25 you want to use the DLM, be sure to enable IPv4/6 networking.
35 interface between GFS2 and the DLM, which is required to use GFS2
/fs/ocfs2/
DKconfig12 system with many similarities to ext3. It supports 64 bit inode
16 You'll want to install the ocfs2-tools package in order to at least
33 to configure it. This comes with the standard ocfs2-tools package.
34 O2CB is limited to maintaining a cluster for OCFS2 file systems.
37 It is always safe to say Y here, as the clustering method is
45 This option will allow OCFS2 to use userspace clustering services
49 It is safe to say Y, as the clustering method is run-time
57 This option allows some fs statistics to be captured. Enabling
66 allows selection of events to log via files in /sys/o2cb/logmask/.
76 this option for debugging only as it is likely to decrease
/fs/ntfs/
DKconfig10 say Y to "NTFS write support" below.
17 the old NTFS code starting with Linux 2.5.11. A backport to
27 If you are not using Windows NT, 2000, XP or 2003 in addition to
28 Linux on your computer it is safe to say N.
35 Y here. This will result in additional consistency checks to be
36 performed by the driver as well as additional debugging messages to
37 be written to the system log. Note that debugging messages are
40 to insmod when loading the ntfs module. Once the driver is active,
49 When reporting bugs, please try to have available a full dump of
60 renaming is possible. Note only non-resident files can be written to
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/fs/autofs/
DKconfig6 This name exists for people to just automatically pick up the
11 transitioned to just plain AUTOFS_FS.
17 The automounter is a tool to automatically mount remote file systems
18 on demand. This implementation is partially kernel-based to reduce
24 to answer Y to "NFS file system support", below.
30 don't have a laptop which needs to dynamically reconfigure to the

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