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journal_abort(9) [centos man page]

JOURNAL_ABORT(9)					     The Linux Journalling API						  JOURNAL_ABORT(9)

journal_abort - Shutdown the journal immediately. SYNOPSIS
void journal_abort(journal_t * journal, int errno); ARGUMENTS
journal the journal to shutdown. errno an error number to record in the journal indicating the reason for the shutdown. DESCRIPTION
Perform a complete, immediate shutdown of the ENTIRE journal (not of a single transaction). This operation cannot be undone without closing and reopening the journal. The journal_abort function is intended to support higher level error recovery mechanisms such as the ext2/ext3 remount-readonly error mode. Journal abort has very specific semantics. Any existing dirty, unjournaled buffers in the main filesystem will still be written to disk by bdflush, but the journaling mechanism will be suspended immediately and no further transaction commits will be honoured. Any dirty, journaled buffers will be written back to disk without hitting the journal. Atomicity cannot be guaranteed on an aborted filesystem, but we _do_ attempt to leave as much data as possible behind for fsck to use for cleanup. Any attempt to get a new transaction handle on a journal which is in ABORT state will just result in an -EROFS error return. A journal_stop on an existing handle will return -EIO if we have entered abort state during the update. Recursive transactions are not disturbed by journal abort until the final journal_stop, which will receive the -EIO error. Finally, the journal_abort call allows the caller to supply an errno which will be recorded (if possible) in the journal superblock. This allows a client to record failure conditions in the middle of a transaction without having to complete the transaction to record the failure to disk. ext3_error, for example, now uses this functionality. Errors which originate from within the journaling layer will NOT supply an errno; a null errno implies that absolutely no further writes are done to the journal (unless there are any already in progress). AUTHORS
Roger Gammans <> Author. Stephen Tweedie <> Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 JOURNAL_ABORT(9)

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MKREISERFS(8)						      System Manager's Manual						     MKREISERFS(8)

mkreiserfs - create a Linux ReiserFS file system SYNOPSIS
mkreiserfs [ -dfV ] [ -b | --block-size N ] [ -h | --hash HASH ] [ -u | --uuid UUID ] [ -l | --label LABEL ] [ --format FORMAT ] [ -j | --journal-device FILE ] [ -s | --journal-size N ] [ -o | --journal-offset N ] [ -t | --transaction-max-size N ] device [ filesystem-size ] DESCRIPTION
It creates a Linux ReiserFS file system on a device (usually a disk partition). device is the special file corresponding to the device (e.g /dev/hdXX for IDE disk partition or /dev/sdXX for SCSI disk partition). filesystem-size size of filesystem in blocks. If omitted, it will be determined by mkreiserfs automatically. OPTIONS
-b | --block-size N N is block size in bytes. 4096 only for now. -h | --hash HASH HASH specifies the name of hash function file names in directories will be sorted with. Choose one of r5, rupasov, tea. r5 is default --format FORMAT FORMAT specifies a format new filsystem has to be of. Choose one of 3.5 and 3.6. If none is specified mkreiserfs will create format 3.6 if running kernel is 2.4, 3.5 if 2.2 is running, and will refuse creation under other kernels. -u | --uuid UUID Set the universally unique identifier ( UUID ) of the filesystem to UUID (see also uuidgen(8)). The format of the UUID is a series of hex digits separated by hypthens, like this: "c1b9d5a2-f162-11cf-9ece-0020afc76f16". If the option skipped, mkreiserfs generates a new one. -l | --label LABEL Set the volume label of the filesystem. LABEL can be at most 16 characters long; if it is longer than 16 characters, mkreiserfs will truncate it. -j | --journal-device FILE FILE is name of block device where the file system is to have journal on. -o | --journal-offset N N is an offset where journal starts when it is to be on a separate device. Default is 0. Makes no effect when journal is to be on a host device -s | --journal-size N N is size of journal in blocks. When journal is to be on a separate device - its size defaults to number of blocks that device has. When journal is to be on a host device - its size defaults 8193 and maximal possible value is 32749 (for blocksize 4k). Minimun is 513 for both cases. -t | --transaction-max-size N N is the maximum transaction size parameter for the journal. The default, and max possible, value is 1024 blocks. It should be less than half the size of the journal. If specifed incorrectly, it will be adjusted. -f This forces mkreiserfs to continue even if device is either whole disk, or looks mounted or is not a block device. Specified more than once allows to avoid asking for confirmation. -d This makes mkreiserfs to print debugging information during mkreiserfs. -V This prints version and exits. AUTHOR
This version of mkreiserfs has been written by Edward Shishkin <>. BUGS
No other blocksizes but 4k are available. Please, report about other bugs to the ReiserFS mail-list <> SEE ALSO
reiserfsck(8), debugreiserfs(8), reiserfstune(8) Reiserfsprogs-3.6.4 January 2002 MKREISERFS(8)
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