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  1. 02 12月, 2014 1 次提交
    • N
      target/file: Convert to external fileio_backend_dev_attrs · b2320497
      由 Nicholas Bellinger 提交于 
      This patch converts FILEIO to use an external set of device attributes,
and utilizes target_core_backend_configfs.h macros to generate a default
set of configfs extended-attr handlers.

It calls target_core_setup_sub_cits() to setup the initial config_item_type
based on existing target_core_configfs.c defaults, and using configfs_attribute
generated by DEF_TB_DEFAULT_ATTRIBS(fileio) populates fileio_backend_dev_attrs[]

It introduces no functional change for existing FILEIO device attributes.
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      b2320497
  3. 08 10月, 2014 1 次提交
  5. 18 9月, 2014 1 次提交
  7. 07 4月, 2014 1 次提交
  9. 19 1月, 2014 2 次提交
    • N
      target/file: Add DIF protection support to fd_execute_rw · 42201b55
      由 Nicholas Bellinger 提交于 
      This patch adds support for DIF protection into fd_execute_rw() code
for WRITE/READ I/O using sbc_dif_verify_[write,read]() logic.

It adds fd_do_prot_rw() for handling interface with FILEIO PI, and
uses a locally allocated fd_prot->prot_buf + fd_prot->prot_sg for
interacting with SBC DIF verify emulation code.

Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      42201b55
    • N
      target/file: Add DIF protection init/format support · 0f5e2ec4
      由 Nicholas Bellinger 提交于 
      This patch adds support for DIF protection init/format support into
the FILEIO backend.

It involves using a seperate $FILE.protection for storing PI that is
opened via fd_init_prot() using the common pi_prot_type attribute.
The actual formatting of the protection is done via fd_format_prot()
using the common pi_prot_format attribute, that will populate the
initial PI data based upon the currently configured pi_prot_type.

Based on original FILEIO code from Sagi.

v1 changes:
  - Fix sparse warnings in fd_init_format_buf (Fengguang)

Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      0f5e2ec4
  11. 19 12月, 2013 1 次提交
  13. 21 11月, 2013 1 次提交
  15. 11 9月, 2013 1 次提交
  17. 10 9月, 2013 1 次提交
    • N
      target: Allow sbc_ops->execute_rw() to accept SGLs + data_direction · a82a9538
      由 Nicholas Bellinger 提交于 
      COMPARE_AND_WRITE expects to be able to send down a DMA_FROM_DEVICE
to obtain the necessary READ payload for comparision against the
first half of the WRITE payload containing the verify user data.

Currently virtual backends expect to internally reference SGLs,
SGL nents, and data_direction, so change IBLOCK, FILEIO and RD
sbc_ops->execute_rw() to accept this values as function parameters.

Also add default sbc_execute_rw() handler for the typical case for
cmd->execute_rw() submission using cmd->t_data_sg, cmd->t_data_nents,
and cmd->data_direction).

v2 Changes:
  - Add SCF_COMPARE_AND_WRITE command flag
  - Use sbc_execute_rw() for normal cmd->execute_rw() submission
    with expected se_cmd members.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Chris Mason <chris.mason@fusionio.com>
Cc: James Bottomley <JBottomley@Parallels.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: NNicholas Bellinger <nab@daterainc.com>
      a82a9538
  19. 13 8月, 2013 1 次提交
  21. 31 5月, 2013 1 次提交
  23. 04 5月, 2013 1 次提交
  25. 25 4月, 2013 5 次提交
  27. 28 2月, 2013 1 次提交
  29. 24 2月, 2013 1 次提交
  31. 23 2月, 2013 1 次提交
  33. 21 2月, 2013 1 次提交
    • N
      target/file: Add WRITE_SAME w/ UNMAP=0 emulation support · 7b745c84
      由 Nicholas Bellinger 提交于 
      This patch adds support for emulation of WRITE_SAME w/ UNMAP=0 within
fd_execute_write_same() backend code.

The emulation uses vfs_writev() to submit a locally populated buffer
from the received WRITE_SAME scatterlist block for duplication, and by
default enforces a limit of max_write_same_len=0x1000 (8192) sectors up
to the limit of 1024 iovec entries for the single call to vfs_writev().

It also sets max_write_same_len to the operational default at setup ->
fd_configure_device() time.

Tested with 512, 1k, 2k, and 4k block_sizes.

(asias: convert to vzalloc)

Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Asias He <asias@redhat.com>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      7b745c84
  35. 06 12月, 2012 2 次提交
  37. 28 11月, 2012 1 次提交
  39. 07 11月, 2012 5 次提交
  41. 03 10月, 2012 1 次提交
    • N
      target/file: Re-enable optional fd_buffered_io=1 operation · b32f4c7e
      由 Nicholas Bellinger 提交于 
      This patch re-adds the ability to optionally run in buffered FILEIO mode
(eg: w/o O_DSYNC) for device backends in order to once again use the
Linux buffered cache as a write-back storage mechanism.

This logic was originally dropped with mainline v3.5-rc commit:

commit a4dff304
Author: Nicholas Bellinger <nab@linux-iscsi.org>
Date:   Wed May 30 16:25:41 2012 -0700

    target/file: Use O_DSYNC by default for FILEIO backends

This difference with this patch is that fd_create_virtdevice() now
forces the explicit setting of emulate_write_cache=1 when buffered FILEIO
operation has been enabled.

(v2: Switch to FDBD_HAS_BUFFERED_IO_WCE + add more detailed
     comment as requested by hch)
Reported-by: NFerry <iscsitmp@bananateam.nl>
Cc: Christoph Hellwig <hch@lst.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      b32f4c7e
  43. 18 9月, 2012 1 次提交
  45. 01 8月, 2012 1 次提交
    • A
      delousing target_core_file a bit · dbc6e022
      由 Al Viro 提交于 
      * set_fs(KERNEL_DS) + getname() is probably the weirdest implementation
of strdup() I've seen.  Especially since they don't to copy it at all...
* filp_open() never returns NULL; it's ERR_PTR(-E...) on failure.
* file->f_dentry is never going to be NULL, TYVM.
* match_strdup() + snprintf() + kfree() is a bloody weird way to spell
match_strlcpy().

Pox on cargo-cult programmers...
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      dbc6e022
  47. 17 7月, 2012 3 次提交
  49. 03 6月, 2012 1 次提交
    • N
      target/file: Use O_DSYNC by default for FILEIO backends · a4dff304
      由 Nicholas Bellinger 提交于 
      Convert to use O_DSYNC for all cases at FILEIO backend creation time to
avoid the extra syncing of pure timestamp updates with legacy O_SYNC during
default operation as recommended by hch.  Continue to do this independently of
Write Cache Enable (WCE) bit, as WCE=0 is currently the default for all backend
devices and enabled by user on per device basis via attrib/emulate_write_cache.

This patch drops the now unnecessary fd_buffered_io= token usage that was
originally signalling when to explictly disable O_SYNC at backend creation
time for buffered I/O operation.  This can end up being dangerous for a number
of reasons during physical node failure, so go ahead and drop this option
for now when O_DSYNC is used as the default.

Also allow explict FUA WRITEs -> vfs_fsync_range() call to function in
fd_execute_cmd() independently of WCE bit setting.
Reported-by: NChristoph Hellwig <hch@lst.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      a4dff304
  51. 18 5月, 2012 1 次提交
  53. 07 5月, 2012 2 次提交