mkfs.exofs --pid=65536 --format /dev/osd0
- The --format is optional if not specified no OSD_FORMAT will be
- preformed and a clean file system will be created in the specified pid,
+ The --format is optional. If not specified, no OSD_FORMAT will be
+ performed and a clean file system will be created in the specified pid,
in the available space of the target. (Use --format=size_in_meg to limit
the total LUN space available)
- If pid already exist it will be deleted and a new one will be created in it's
- place. Be careful.
+ If pid already exists, it will be deleted and a new one will be created in
+ its place. Be careful.
An exofs lives inside a single OSD partition. You can create multiple exofs
filesystems on the same device using multiple pids.
7. For reference (See do-exofs example script):
do-exofs start - an example of how to perform the above steps.
- do-exofs stop - an example of how to unmount the file system.
+ do-exofs stop - an example of how to unmount the file system.
do-exofs format - an example of how to format and mkfs a new exofs.
8. Extra compilation flags (uncomment in fs/exofs/Kbuild):
exofs specific options: Options are separated by commas (,)
pid=<integer> - The partition number to mount/create as
container of the filesystem.
- This option is mandatory
- to=<integer> - Timeout in ticks for a single command
+ This option is mandatory.
+ to=<integer> - Timeout in ticks for a single command.
default is (60 * HZ) [for debugging only]
===============================================================================
with a special ID (defined in common.h).
Information included in the file system control block is used to fill the
in-memory superblock structure at mount time. This object is created before
- the file system is used by mkexofs.c It contains information such as:
+ the file system is used by mkexofs.c. It contains information such as:
- The file system's magic number
- The next inode number to be allocated
attributes. This applies to both regular files and other types (directories,
device files, symlinks, etc.).
-* Credentials are generated per object (inode and superblock) when they is
- created in memory (read off disk or created). The credential works for all
+* Credentials are generated per object (inode and superblock) when they are
+ created in memory (read from disk or created). The credential works for all
operations and is used as long as the object remains in memory.
* Async OSD operations are used whenever possible, but the target may execute
from executing in reverse order:
- The following are handled with the OBJ_CREATED and OBJ_2BCREATED
flags. OBJ_CREATED is set when we know the object exists on the OSD -
- in create's callback function, and when we successfully do a read_inode.
+ in create's callback function, and when we successfully do a
+ read_inode.
OBJ_2BCREATED is set in the beginning of the create function, so we
know that we should wait.
- create/delete: delete should wait until the object is created