e2fsprogs: Update man pages, usage texts, and docs.

index 45aceb2..8f4c4f5 100644
@@ -78,6 +78,14 @@ lifts this limit by causing ext4 to use a link count of 1 to indicate
 that the number of hard links to a directory is not known when the link
 count might exceed the maximum count limit.
 .TP
+.B ea_inode
+.br
+Normally, a file's extended attributes and associated metadata must fit within
+the inode or the inode's associated extended attribute block. This feature
+allows the value of each extended attribute to be placed in the data blocks of a
+separate inode if necessary, increasing the limit on the size and number of
+extended attributes per file.
+.TP
 .B encrypt
 .br
 This ext4 feature provides file-system level encryption of data blocks

@@ -175,27 +183,40 @@ option to
 or
 .BR tune2fs(8).
 .TP
+.B large_dir
+.br
+This feature increases the limit on the number of files per directory by
+raising the maximum size of directories and, for hashed b-tree directories (see
+.BR dir_index ),
+the maximum height of the hashed b-tree used to store the directory entries.
+.TP
 .B large_file
 .br
 This feature flag is set automatically by modern kernels when a file
 larger than 2 gigabytes is created.  Very old kernels could not
 handle large files, so this feature flag was used to prohibit those
 kernels from mounting file systems that they could not understand.
-.\" .TP
-.\" .B metadata_csum
-.\" .br
-.\" This ext4 feature enables metadata checksumming.  This feature stores
-.\" checksums for all of the filesystem metadata (superblock, group
-.\" descriptor blocks, inode and block bitmaps, directories, and
-.\" extent tree blocks).  The checksum algorithm used for the metadata
-.\" blocks is different than the one used for group descriptors with the
-.\" .B uninit_bg
-.\" feature, these two features are incompatible and
-.\" .B metadata_csum
-.\" will be used preferentially instead of
-.\" .BR uninit_bg .
-.\" .br
-.\" .B Future feature, available in e2fsprogs 1.43-WIP
+.TP
+.B metadata_csum
+.br
+This ext4 feature enables metadata checksumming.  This feature stores
+checksums for all of the filesystem metadata (superblock, group
+descriptor blocks, inode and block bitmaps, directories, and
+extent tree blocks).  The checksum algorithm used for the metadata
+blocks is different than the one used for group descriptors with the
+.B uninit_bg
+feature.  These two features are incompatible and
+.B metadata_csum
+will be used preferentially instead of
+.BR uninit_bg .
+.TP
+.B metadata_csum_seed
+.br
+This feature allows the filesystem to store the metadata checksum seed in the
+superblock, which allows the administrator to change the UUID of a filesystem
+using the
+.B metadata_csum
+feature while it is mounted.
 .TP
 .B meta_bg
 .br

@@ -214,10 +235,6 @@ available in the resize inode.
 This ext4 feature provides multiple mount protection (MMP).  MMP helps to
 protect the filesystem from being multiply mounted and is useful in
 shared storage environments.
-.IP
-Causes the quota files (i.e., user.quota and
-group.quota which existed
-in the older quota design) to be hidden inodes.
 .TP
 .B project
 .br

@@ -230,6 +247,10 @@ Create quota inodes (inode #3 for userquota and inode
 #4 for group quota) and set them in the superblock.
 With this feature, the quotas will be enabled
 automatically when the filesystem is mounted.
+.IP
+Causes the quota files (i.e., user.quota and
+group.quota which existed
+in the older quota design) to be hidden inodes.
 .TP
 .B resize_inode
 .br

@@ -248,6 +269,8 @@ extended option.
 .IP
 This feature requires that the
 .B sparse_super
+or
+.B sparse_super2
 feature be enabled.
 .TP
 .B sparse_super

@@ -382,18 +405,26 @@ These options determine who can use the reserved blocks.
 (Roughly: whoever has the specified uid, or belongs to the specified group.)
 .TP
 .BI sb= n
-Instead of block 1, use block
-.I n
-as superblock. This could be useful when the filesystem has been damaged.
-(Earlier, copies of the superblock would be made every 8192 blocks: in
-block 1, 8193, 16385, \&...\& (and one got thousands of copies on
-a big filesystem). Since version 1.08,
+Instead of using the normal superblock, use an alternative superblock
+specified by
+.IR n .
+This option is normally used when the primary superblock has been
+corrupted.  The location of backup superblocks is dependent on the
+filesystem's blocksize, the number of blocks per group, and features
+such as
+.BR sparse_super .
+.IP
+Additional backup superblocks can be determined by using the
 .B mke2fs
-has a \-s (sparse superblock) option to reduce the number of backup
-superblocks, and since version 1.15 this is the default. Note
-that this may mean that ext2 filesystems created by a recent
+program using the
+.B \-n
+option to print out where the superblocks exist, supposing
 .B mke2fs
-cannot be mounted r/w under Linux 2.0.*.)
+is supplied with arguments that are consistent with the filesystem's layout
+(e.g. blocksize, blocks per group,
+.BR sparse_super ,
+etc.).
+.IP
 The block number here uses 1\ k units. Thus, if you want to use logical
 block 32768 on a filesystem with 4\ k blocks, use "sb=131072".
 .TP

@@ -470,13 +501,22 @@ Enable Extended User Attributes. See the
 .BR attr (5)
 manual page.
 .TP
-.BR usrjquota=aquota.user | grpjquota=aquota.group | jqfmt=vfsv0
+.BR jqfmt= { vfsold | vfsv0 | vfsv1 }
 Apart from the old quota system (as in ext2, jqfmt=vfsold aka version 1 quota)
-ext3 also supports journaled quotas (version 2 quota). jqfmt=vfsv0
-enables journaled quotas. For journaled quotas the mount options
+ext3 also supports journaled quotas (version 2 quota). jqfmt=vfsv0 or
+jqfmt=vfsv1 enables journaled quotas. Journaled quotas have the advantage that
+even after a crash no quota check is required. When the
+.B quota
+filesystem feature is enabled, journaled quotas are used automatically, and
+this mount option is ignored.
+.TP
+.BR usrjquota=aquota.user | grpjquota=aquota.group
+For journaled quotas (jqfmt=vfsv0 or jqfmt=vfsv1), the mount options
 usrjquota=aquota.user and grpjquota=aquota.group are required to tell the
-quota system which quota database files to use. Journaled quotas have the
-advantage that even after a crash no quota check is required.
+quota system which quota database files to use. When the
+.B quota
+filesystem feature is enabled, journaled quotas are used automatically, and
+this mount option is ignored.
 
 .SH "Mount options for ext4"
 The ext4 filesystem is an advanced level of the ext3 filesystem which

@@ -484,16 +524,16 @@ incorporates scalability and reliability enhancements for supporting large
 filesystem.
 
 The options
-.B journal_dev, norecovery, noload, data, commit, orlov, oldalloc, [no]user_xattr
-.B [no]acl, bsddf, minixdf, debug, errors, data_err, grpid, bsdgroups, nogrpid
-.B sysvgroups, resgid, resuid, sb, quota, noquota, nouid32, grpquota, usrquota
-.B usrjquota, grpjquota and jqfmt
-are backwardly compatible with ext3 or ext2.
+.B journal_dev, journal_path, norecovery, noload, data, commit, orlov,
+.B oldalloc, [no]user_xattr, [no]acl, bsddf, minixdf, debug, errors,
+.B data_err, grpid, bsdgroups, nogrpid, sysvgroups, resgid, resuid, sb,
+.B quota, noquota, nouid32, grpquota, usrquota, usrjquota, grpjquota,
+.B and jqfmt are backwardly compatible with ext3 or ext2.
 .TP
-.B journal_checksum
-Enable checksumming of the journal transactions.  This will allow the recovery
-code in e2fsck and the kernel to detect corruption in the kernel.  It is a
-compatible change and will be ignored by older kernels.
+.B journal_checksum | nojournal_checksum
+The journal_checksum option enables checksumming of the journal transactions.
+This will allow the recovery code in e2fsck and the kernel to detect corruption
+in the kernel. It is a compatible change and will be ignored by older kernels.
 .TP
 .B journal_async_commit
 Commit block can be written to disk without waiting for descriptor blocks. If

@@ -592,7 +632,7 @@ sparse/thinly-provisioned LUNs, but it is off by default until sufficient
 testing has been done.
 .TP
 .BR block_validity / noblock_validity
-This options enables/disables the in-kernel facility for tracking
+This option enables/disables the in-kernel facility for tracking
 filesystem metadata blocks within internal data structures. This allows multi-\c
 block allocator and other routines to quickly locate extents which might
 overlap with filesystem metadata blocks. This option is intended for debugging

@@ -619,6 +659,18 @@ seriously cramp the system's style.)
 .TP
 .B i_version
 Enable 64-bit inode version support. This option is off by default.
+.TP
+.B nombcache
+This option disables use of mbcache for extended attribute deduplication. On
+systems where extended attributes are rarely or never shared between files,
+use of mbcache for deduplication adds unnecessary computational overhead.
+.TP
+.B prjquota
+The prjquota mount option enables project quota support on the filesystem.
+You need the quota utilities to actually enable and manage the quota system.
+This mount option requires the
+.B project
+filesystem feature.
 
 .SH FILE ATTRIBUTES
 The ext2, ext3, and ext4 filesystems support setting the following file

@@ -704,8 +756,14 @@ ext4, 3.16
 ext4, 3.18
 .IP "\fBencrypt\fR" 2in
 ext4, 4.1
+.IP "\fBmetadata_csum_seed\fR" 2in
+ext4, 4.4
 .IP "\fBproject\fR" 2in
 ext4, 4.5
+.IP "\fBea_inode\fR" 2in
+ext4, 4.13
+.IP "\fBlarge_dir\fR" 2in
+ext4, 4.13
 .SH SEE ALSO
 .BR mke2fs (8),
 .BR mke2fs.conf (5),

index 4c29943..1a3bd46 100644
@@ -101,21 +101,21 @@ Instead of using the normal superblock, use an alternative superblock
 specified by
 .IR superblock .
 This option is normally used when the primary superblock has been
-corrupted.  The location of the backup superblock is dependent on the
-filesystem's blocksize.  For filesystems with 1k blocksizes, a backup
-superblock can be found at block 8193; for filesystems with 2k
-blocksizes, at block 16384; and for 4k blocksizes, at block 32768.
+corrupted.  The location of backup superblocks is dependent on the
+filesystem's blocksize, the number of blocks per group, and features
+such as
+.BR sparse_super .
 .IP
 Additional backup superblocks can be determined by using the
 .B mke2fs
 program using the
 .B \-n
-option to print out where the superblocks were created.   The
-.B \-b
-option to
-.BR mke2fs ,
-which specifies blocksize of the filesystem must be specified in order
-for the superblock locations that are printed out to be accurate.
+option to print out where the superblocks exist, supposing
+.B mke2fs
+is supplied with arguments that are consistent with the filesystem's layout
+(e.g. blocksize, blocks per group,
+.BR sparse_super ,
+etc.).
 .IP
 If an alternative superblock is specified and
 the filesystem is not opened read-only, e2fsck will make sure that the

@@ -472,6 +472,11 @@ man page for more details.
 Always include the full version string which
 .B e2fsck
 displays when it is run, so I know which version you are running.
+.SH ENVIRONMENT
+.TP
+.BI E2FSCK_CONFIG
+Determines the location of the configuration file (see
+.BR e2fsck.conf (5)).
 .SH AUTHOR
 This version of
 .B e2fsck

index a727932..708e213 100644
@@ -69,6 +69,12 @@ This stanza contains general configuration parameters for
 .BR e2fsck 's
 behavior.
 .TP
+.I [defaults]
+Contains relations which define the default parameters used by
+.BR e2fsck (8).
+In general, these defaults may be overridden by command-line options
+provided by the user.
+.TP
 .I [problems]
 This stanza allows the administrator to reconfigure how e2fsck handles
 various filesystem inconsistencies.

@@ -250,6 +256,19 @@ If this boolean relation is true, e2fsck will run as if the option
 .B -v
 is always specified.  This will cause e2fsck to print some additional
 information at the end of each full file system check.
+.SH THE [defaults] STANZA
+The following relations are defined in the
+.I [defaults]
+stanza.
+.TP
+.I undo_dir
+This relation specifies the directory where the undo file should be
+stored.  It can be overridden via the
+.B E2FSPROGS_UNDO_DIR
+environment variable.  If the directory location is set to the value
+.IR none ,
+.B e2fsck
+will not create an undo file.
 .SH THE [problems] STANZA
 Each tag in the
 .I [problems]

@@ -336,7 +355,7 @@ data structure, such as pruning an extent tree.
 @[email protected]
 @[email protected] numdirs_threshold
 @TDB_MAN_COMMENT@If this relation is set, then in-memory data structures
-@TDB_MAN_COMMENT@be used if the number of directories in the filesystem
+@TDB_MAN_COMMENT@will be used if the number of directories in the filesystem
 @TDB_MAN_COMMENT@are fewer than amount specified.
 @[email protected]
 @[email protected] dirinfo

index 55abd71..4b5f472 100644
@@ -143,7 +143,7 @@ Before overwriting a file system block, write the old contents of the block to
 an undo file.  This undo file can be used with e2undo(8) to restore the old
 contents of the file system should something go wrong.  If the empty string is
 passed as the undo_file argument, the undo file will be written to a file named
-resize2fs-\fIdevice\fR.e2undo in the directory specified via the
+debugfs-\fIdevice\fR.e2undo in the directory specified via the
 \fIE2FSPROGS_UNDO_DIR\fR environment variable.
 
 WARNING: The undo file cannot be used to recover from a power or system crash.

@@ -237,8 +237,11 @@ Search the directory
 for
 .IR filename .
 .TP
-.B dirty
+.BI dirty " [-clean]"
 Mark the filesystem as dirty, so that the superblocks will be written on exit.
+Additionally, clear the superblock's valid flag, or set it if
+.I -clean
+is specified.
 .TP
 .BI dump " [-p] filespec out_file"
 Dump the contents of the inode

@@ -290,7 +293,10 @@ not stored in filesystem data structures.   Hence, the values displayed
 may not necessarily by accurate and does not indicate a problem or
 corruption in the file system.)
 .TP
-.BI ea_get " [-f outfile] filespec attr_name"
+.B dump_unused
+Dump unused blocks which contain non-null bytes.
+.TP
+.BI ea_get " [-f outfile]|[-xVC] [-r] filespec attr_name"
 Retrieve the value of the extended attribute
 .I attr_name
 in the file

@@ -302,7 +308,7 @@ List the extended attributes associated with the file
 .I filespec
 to standard output.
 .TP
-.BI ea_set " [-f infile] filespec attr_name attr_value
+.BI ea_set " [-f infile] [-r] filespec attr_name attr_value
 Set the value of the extended attribute
 .I attr_name
 in the file

@@ -402,6 +408,9 @@ If
 .I num
 is specified, also clear num-1 inodes after the specified inode.
 .TP
+.BI get_quota " quota_type id"
+Display quota information for given quota type (user, group, or project) and ID.
+.TP
 .B help
 Print a list of commands understood by
 .BR debugfs .

@@ -437,7 +446,7 @@ the superblock and block descriptors.
 .BI journal_close
 Close the open journal.
 .TP
-.BI journal_open " [-c] [-v ver] [-j ext_jnl]
+.BI journal_open " [-c] [-v ver] [-f ext_jnl]
 Opens the journal for reading and writing.  Journal checksumming can
 be enabled by supplying \fI-c\fR; checksum formats 2 and 3 can be
 selected with the \fI-v\fR option.  An external journal can be loaded

@@ -469,6 +478,9 @@ process to
 .I directory
 on the native filesystem.
 .TP
+.BI list_quota " quota_type"
+Display quota information for given quota type (user, group, or project).
+.TP
 .BI ln " filespec dest_file"
 Create a link named
 .I dest_file

@@ -476,7 +488,7 @@ which is a hard link to
 .IR filespec .
 Note this does not adjust the inode reference counts.
 .TP
-.BI logdump " [-acsO] [-b block] [-i filespec] [-f journal_file] [output_file]"
+.BI logdump " [-acsOS] [-b block] [-i filespec] [-f journal_file] [output_file]"
 Dump the contents of the ext3 journal.  By default, dump the journal inode as
 specified in the superblock.  However, this can be overridden with the
 .I \-i

@@ -490,6 +502,12 @@ option utilizes the backup information in the superblock to locate the
 journal.
 .IP
 The
+.I \-S
+option causes
+.B logdump
+to print the contents of the journal superblock.
+.IP
+The
 .I \-a
 option causes the
 .B logdump

@@ -498,7 +516,7 @@ The
 .I \-b
 option causes
 .B logdump
-to print all journal records that are refer to the specified block.
+to print all journal records that refer to the specified block.
 The
 .I \-c
 option will print out the contents of all of the data blocks selected by

@@ -570,7 +588,7 @@ to those inodes.  The
 flag will enable checking the file type information in the directory
 entry to make sure it matches the inode's type.
 .TP
-.BI open " [-weficD] [-b blocksize] [-s superblock] [-z undo_file] device"
+.BI open " [-weficD] [-b blocksize] [-d image_filename] [-s superblock] [-z undo_file] device"
 Open a filesystem for editing.  The
 .I -f
 flag forces the filesystem to be opened even if there are some unknown

@@ -578,7 +596,7 @@ or incompatible filesystem features which would normally
 prevent the filesystem from being opened.  The
 .I -e
 flag causes the filesystem to be opened in exclusive mode.  The
-.IR -b ", " -c ", " -i ", " -s ", " -w ", and " -D
+.IR -b ", " -c ", " -d ", " -i ", " -s ", " -w ", and " -D
 options behave the same as the command-line options to
 .BR debugfs .
 .TP

@@ -649,6 +667,10 @@ has value
 Also available as
 .BR set_bg .
 .TP
+.BI set_current_time " time"
+Set current time in seconds since Unix epoch to use when setting filesystem
+fields.
+.TP
 .BI seti " filespec [num]"
 Mark inode
 .I filespec

@@ -691,6 +713,11 @@ can be displayed by using the command:
 Also available as
 .BR ssv .
 .TP
+.B show_debugfs_params
+Display
+.B debugfs
+parameters such as information about currently opened filesystem.
+.TP
 .BI show_super_stats " [-h]"
 List the contents of the super block and the block group descriptors.  If the
 .I -h

@@ -701,6 +728,10 @@ flag is given, only print out the superblock contents. Also available as
 Display the contents of the inode structure of the inode
 .IR filespec .
 .TP
+.B supported_features
+Display filesystem features supported by this version of
+.BR debugfs .
+.TP
 .BI testb " block [count]"
 Test if the block number
 .I block

index 967b808..6a1d446 100644
@@ -29,7 +29,7 @@ The operator '+' causes the selected attributes to be added to the
 existing attributes of the files; '-' causes them to be removed; and '='
 causes them to be the only attributes that the files have.
 .PP
-The letters 'aAcCdDeijsStTu' select the new attributes for the files:
+The letters 'aAcCdDeijPsStTu' select the new attributes for the files:
 append only (a),
 no atime updates (A),
 compressed (c),

index f28a76e..a7bfdf2 100644
@@ -11,7 +11,7 @@ e2image \- Save critical ext2/ext3/ext4 filesystem metadata to a file
 .B \-r|Q
 ]
 [
-.B \-fr
+.B \-f
 ]
 .I device
 .I image-file

index da8b918..d8265b1 100644
@@ -17,8 +17,16 @@ e2undo \- Replay an undo log for an ext2/ext3/ext4 filesystem
 .B \-n
 ]
 [
+.B \-o
+.I offset
+]
+[
 .B \-v
 ]
+[
+.B \-z
+.I undo_file
+]
 .I undo_log device
 .SH DESCRIPTION
 .B e2undo

@@ -53,6 +61,16 @@ Specify the filesystem's
 .TP
 .B \-v
 Report which block we're currently replaying.
+.TP
+.BI \-z " undo_file"
+Before overwriting a file system block, write the old contents of the block to
+an undo file.  This undo file can be used with e2undo(8) to restore the old
+contents of the file system should something go wrong.  If the empty string is
+passed as the undo_file argument, the undo file will be written to a file named
+e2undo-\fIdevice\fR.e2undo in the directory specified via the
+\fIE2FSPROGS_UNDO_DIR\fR environment variable.
+
+WARNING: The undo file cannot be used to recover from a power or system crash.
 .SH AUTHOR
 .B e2undo
 was written by Aneesh Kumar K.V. ([email protected])

index 6c5e470..169ab58 100644
@@ -2,19 +2,19 @@
 .SH NAME
 e4crypt \- ext4 filesystem encryption utility
 .SH SYNOPSIS
-.B e4crypt add_key -S \fR[\fB -k \fIkeyring\fR ] [\fB-v\fR] [\fB-q\fR] [ \fI path\fR ... ]
+.B e4crypt add_key -S \fR[\fB -k \fIkeyring\fR ] [\fB-v\fR] [\fB-q\fR] \fR[\fB -p \fIpad\fR ] [ \fIpath\fR ... ]
 .br
 .B e4crypt new_session
 .br
 .B e4crypt get_policy \fIpath\fR ...
 .br
-.B e4crypt set_policy \fIpolicy path\fR ...
+.B e4crypt set_policy \fR[\fB -p \fIpad\fR ] \fIpolicy path\fR ...
 .SH DESCRIPTION
 .B e4crypt
 performs encryption management for ext4 file systems.
 .SH COMMANDS
 .TP
-.B e4crypt add_key -S \fR[\fB -k \fIkeyring\fR ] [\fB-v\fR] [\fB-q\fR] [ \fI path\fR ... ]
+.B e4crypt add_key -S \fR[\fB -k \fIkeyring\fR ] [\fB-v\fR] [\fB-q\fR] \fR[\fB -p \fIpad\fR ] [ \fIpath\fR ... ]
 Prompts the user for a passphrase and inserts it into the specified
 keyring.  If no keyring is specified, e4crypt will use the session
 keyring if it exists or the user session keyring if it does not.

@@ -30,7 +30,7 @@ Print the policy for the directories specified on the command line.
 Give the invoking process (typically a shell) a new session keyring,
 discarding its old session keyring.
 .TP
-.B e4crypt set_policy \fIpolicy path\fR ...
+.B e4crypt set_policy \fR[\fB -p \fIpad\fR ] \fIpolicy path\fR ...
 Sets the policy for the directories specified on the command line.
 All directories must be empty to set the policy; if the directory
 already has a policy established, e4crypt will validate that the

index bb15769..4d02a95 100644
@@ -30,8 +30,8 @@ List all files in directories, including files that start with `.'.
 List directories like other files, rather than listing their contents.
 .TP
 .B \-l
-Print the options using a long names instead of a single
-character abbreviation.
+Print the options using long names instead of single
+character abbreviations.
 .TP
 .B \-p
 List the file's project number.

index 766bf52..7b989e0 100644
@@ -18,6 +18,10 @@ mke2fs \- create an ext2/ext3/ext4 filesystem
 .I block-size
 ]
 [
+.B \-C
+.I cluster-size
+]
+[
 .B \-d
 .I root-directory
 ]

@@ -792,6 +796,11 @@ If set to non-zero integer value, its value is used to determine first meta
 block group. This is mostly for debugging purposes.
 .TP
 .BI MKE2FS_DEVICE_SECTSIZE
+If set to non-zero integer value, its value is used to determine logical
+sector size of the
+.IR device .
+.TP
+.BI MKE2FS_DEVICE_PHYS_SECTSIZE
 If set to non-zero integer value, its value is used to determine physical
 sector size of the
 .IR device .

120 lines not on this page · raw message

index b1f43ec..740d166 100644
@@ -45,18 +45,10 @@ tune2fs \- adjust tunable filesystem parameters on ext2/ext3/ext4 filesystems
 .RI [^]mount-options [,...]
 ]
 [
-.B \-p
-.I mmp_update_interval
-]
-[
 .B \-r
 .I reserved-blocks-count
 ]
 [
-.B \-s
-.I sparse-super-flag
-]
-[
 .B \-u
 .I user
 ]

@@ -537,12 +529,22 @@ The following filesystem features can be set or cleared using
 .BR tune2fs :
 .RS 1.2i
 .TP
+.B 64bit
+Enable the file system to be larger than 2^32 blocks.
+.TP
 .B dir_index
 Use hashed b-trees to speed up lookups for large directories.
 .TP
 .B dir_nlink
 Allow more than 65000 subdirectories per directory.
 .TP
+.B ea_inode
+Allow the value of each extended attribute to be placed in the data blocks of a
+separate inode if necessary, increasing the limit on the size and number of
+extended attributes per file.
+.B Tune2fs
+currently only supports setting this filesystem feature.
+.TP
 .B encrypt
 Enable file system level encryption.
 .B Tune2fs

@@ -574,6 +576,11 @@ Setting the filesystem feature is equivalent to using the
 .B \-j
 option.
 .TP
+.B large_dir
+Increase the limit on the number of files per directory.
+.B Tune2fs
+currently only supports setting this filesystem feature.
+.TP
 .B huge_file
 Support files larger than 2 terabytes in size.
 .TP

@@ -583,6 +590,13 @@ Filesystem can contain files that are greater than 2GB.
 .B metadata_csum
 Store a checksum to protect the contents in each metadata block.
 .TP
+.B metadata_csum_seed
+Allow the filesystem to store the metadata checksum seed in the
+superblock, enabling the administrator to change the UUID of a filesystem
+using the
+.B metadata_csum
+feature while it is mounted.
+.TP
 .B mmp
 Enable or disable multiple mount protection (MMP) feature.
 .TP

@@ -640,9 +654,6 @@ and
 .BR flex_bg
 features are only supported by the ext4 filesystem.
 .TP
-.BI \-p " mmp_check_interval"
-Set the desired MMP check interval in seconds. It is 5 seconds by default.
-.TP
 .BI \-r " reserved-blocks-count"
 Set the number of reserved filesystem blocks.
 .TP

index 7ce74ba..1c3731f 100644
@@ -164,7 +164,7 @@ using @code{ext2fs_flush}.
 
 Most libext2fs functions take a filesystem handle of type
 @code{ext2_filsys}.  A filesystem handle is created either by opening
-an existing function using @code{ext2fs_open}, or by initializing a new
+an existing filesystem using @code{ext2fs_open}, or by initializing a new
 filesystem using @code{ext2fs_initialize}.
 
 @deftypefun errcode_t ext2fs_open (const char *@var{name}, int @var{flags}, int @var{superblock}, int @var{block_size}, io_manager @var{manager}, ext2_filsys *@var{ret_fs})

@@ -186,7 +186,7 @@ filesystem.  Normally this is determined automatically from the
 filesystem superblock.  If @var{block_size} is non-zero, it must match
 the block size found in the superblock, or the error
 @code{EXT2_ET_UNEXPECTED_BLOCK_SIZE} will be returned.  The
-@var{block_size} parameter is also used to help fund the superblock when
+@var{block_size} parameter is also used to help find the superblock when
 @var{superblock} is non-zero.
 
 The @var{flags} argument contains a bitmask of flags which control how

@@ -472,7 +472,7 @@ via @var{got}.
 @deftypefun errcode_t ext2fs_file_write (ext2_file_t @var{file}, const void *@var{buf}, unsigned int @var{nbytes}, unsigned int *@var{written})
 Write @var{wanted} bytes of data from the buffer @var{buf} to the
 current file position of @var{file}.  The number of bytes that was 
-actually written is returned via @var{got}.
+actually written is returned via @var{written}.
 @end deftypefun
 
 @c ----------------------------------------------------------------------

@@ -739,20 +739,20 @@ contain valid block entries.
 
 @deftypefun errcode_t ext2fs_read_dir_block (ext2_filsys @var{fs}, blk_t @var{block}, void *@var{buf})
 
-This function reads a directory block, performing any necessary
+This function reads a directory block, performing
 byte swapping if necessary.
 @end deftypefun
 
 @deftypefun errcode_t ext2fs_write_dir_block (ext2_filsys @var{fs}, blk_t @var{block}, void *@var{buf})
 
-This function writes a directory block, performing any necessary
+This function writes a directory block, performing
 byte swapping if necessary.
 @end deftypefun
 
 @deftypefun errcode_t ext2fs_new_dir_block (ext2_filsys @var{fs}, ext2_ino_t @var{dir_ino}, ext2_ino_t @var{parent_ino}, char **@var{block})
 
 This function creates a new directory block in @var{block}.  If
-@var{dir_ino} is non-zero, then @var{dir_info} and @var{parent_ino} is used
+@var{dir_ino} is non-zero, then @var{dir_ino} and @var{parent_ino} are used
 to initialize directory entries for @file{.} and @file{..}, respectively.
 @end deftypefun
 

@@ -1157,7 +1157,7 @@ trying to turn an inode number into a pathname.
 
 @deftypefun errcode_t ext2fs_init_dblist (ext2_filsys @var{fs}, ext2_dblist *@var{ret_dblist})
 
-Creates a dblist data structure and return it in @var{ret_dblist}.
+Creates a dblist data structure and returns it in @var{ret_dblist}.
 @end deftypefun
 
 @deftypefun void ext2fs_free_dblist (ext2_dblist @var{dblist})

@@ -1234,7 +1234,7 @@ Frees an icount structure.
 
 @deftypefun errcode_t ext2fs_icount_fetch (ext2_icount_t @var{icount}, ext2_ino_t @var{ino}, __u16 *@var{ret})
 
-Returns in @var{ret} fetches the count for a particular inode @var{ino}.
+Returns in @var{ret} the count for a particular inode @var{ino}.
 @end deftypefun
 
 @deftypefun errcode_t ext2fs_icount_increment (ext2_icount_t @var{icount}, ext2_ino_t @var{ino}, __u16 *@var{ret})