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pnfs: revoke device info on bulk layout recall

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20.3. CB_LAYOUTRECALL
"LAYOUTRECALL4_FSID and LAYOUTRECALL4_ALL specify that all the storage device ID to storage device address mappings in the affected file system(s) are also recalled."

pnfs_file_layout_recall() now takes a nfs41_client instead of just the pnfs_file_layout_list, because both the layout list and device list are accessible from nfs41_client.  for bulk recalls, calls new function pnfs_file_device_list_invalidate().  each device with layout_count=0 is removed and freed, and devices in use are flagged as REVOKED and freed when layout_count->0

layout_recall_return() now takes a pnfs_file_layout instead of pnfs_layout for access to pnfs_file_layout.device.  pnfs_layout_io_start() and pnfs_layout_io_finish() do the same, because pnfs_layout_io_finish() calls layout_recall_return().  layout_recall_return() calls pnfs_file_device_put() to release its reference on the device

Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
This commit is contained in:
Casey Bodley 2010-12-02 10:32:15 -05:00
parent e3119c281e
commit 9cd9744567
5 changed files with 86 additions and 40 deletions
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6
daemon/pnfs_io.c
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@ -58,7 +58,7 @@ static enum pnfs_status pattern_init(
enum pnfs_status status;
/* take a reference on the layout so we don't return it during io */
status = pnfs_layout_io_start(&layout->layout);
status = pnfs_layout_io_start(layout);
if (status)
goto out;
@ -70,7 +70,7 @@ static enum pnfs_status pattern_init(
pattern->threads = calloc(pattern->count, sizeof(pnfs_io_thread));
if (pattern->threads == NULL) {
status = PNFSERR_RESOURCES;
pnfs_layout_io_finished(&pattern->layout->layout);
pnfs_layout_io_finished(pattern->layout);
goto out;
}
@ -115,7 +115,7 @@ static void pattern_free(
IN pnfs_io_pattern *pattern)
{
/* inform the layout that our io is finished */
pnfs_layout_io_finished(&pattern->layout->layout);
pnfs_layout_io_finished(pattern->layout);
free(pattern->threads);
}