TagFuse: doing cat .recnum makes tagfuse go infinite.

[cire831]

yes, given what .recnum is this is a silly thing to do, but a natural thing to do and it shouldn't make tagfuse break.

tagfuse goes infinite and there is no connectivity.

running off base station P222, Tagnet tree: ad4011e, mm tree: 59d87a0

• fire up tagfuse: python tagfuse ~/tag/tag01
• cd ~/tag/tag01/\<node_id:ffffffffffff\>/tag/sd/0/dblk
• ll -a (see below)

P222 (16): ll -a
total 0
drwxr-x--x 7 root root      0 Feb  2 15:22 ./
drwxr-x--x 5 root root      0 Feb  2 15:22 ../
drwxr-x--x 3 root root      0 Feb  2 15:22 byte/
-r--r--r-- 1 root root 389304 Feb  2 15:24 .last_rec
-r--r--r-- 1 root root 388096 Feb  2 15:24 .last_sync
--w--w---- 1 root root      0 Feb  2 15:24 note
-r--r--r-- 1 root root   5297 Feb  2 15:24 .recnum
P222 (17):

• now, do cat .recnum. (tagfuse goes nuts, see below)
  the client just hangs. Only way to kill it is to killall -9 tagfuse

Output of tagfuse when going infinite:

DEBUG:fuse.log-mixin:-> getattr /<node_id:ffffffffffff>/tag/sd/0/dblk/.recnum (None,)
0 [u'<node_id:ffffffffffff>', u'tag', u'sd', u'0', u'dblk', u'.recnum']
traverse <node_id:ffffffffffff> False  <class 'taghandlers.FileHandler'> False <type 'type'>
traverse <node_id:ffffffffffff> True <node_id:ffffffffffff> <class 'taghandlers.DirHandler'> True <type 'type'>
True
1 [u'<node_id:ffffffffffff>', u'tag', u'sd', u'0', u'dblk', u'.recnum']
traverse tag False  <class 'taghandlers.FileHandler'> False <type 'type'>
traverse tag True tag <class 'taghandlers.DirHandler'> True <type 'type'>
True
2 [u'<node_id:ffffffffffff>', u'tag', u'sd', u'0', u'dblk', u'.recnum']
traverse sd False  <class 'taghandlers.FileHandler'> False <type 'type'>
traverse sd True sd <class 'taghandlers.DirHandler'> True <type 'type'>
True
3 [u'<node_id:ffffffffffff>', u'tag', u'sd', u'0', u'dblk', u'.recnum']
traverse 0 False  <class 'taghandlers.FileHandler'> False <type 'type'>
traverse 0 True 0 <class 'taghandlers.DirHandler'> True <type 'type'>
True
4 [u'<node_id:ffffffffffff>', u'tag', u'sd', u'0', u'dblk', u'.recnum']
traverse dblk False  <class 'taghandlers.FileHandler'> False <type 'type'>
traverse dblk False img <class 'taghandlers.ImageDirHandler'> True <type 'type'>
traverse dblk True dblk <class 'taghandlers.DirHandler'> True <type 'type'>
True
5 [u'<node_id:ffffffffffff>', u'tag', u'sd', u'0', u'dblk', u'.recnum']
traverse last .recnum False  <class 'taghandlers.FileHandler'>
traverse last .recnum False byte <class 'taghandlers.DirHandler'>
traverse last .recnum False note <class 'taghandlers.DblkIONoteHandler'>
traverse last .recnum True .recnum <class 'taghandlers.ByteIOFileHandler'>
[(tlv_types.NODE_ID, ffffffffffff), (tlv_types.STRING, tag), (tlv_types.STRING, sd), (tlv_types.INTEGER, 0), (tlv_types.STRING, dblk), (tlv_types.STRING, .recnum)]
[(tlv_types.SIZE, 14181)]
DEBUG:fuse.log-mixin:<- getattr ByteIOFileHandler([('st_ctime', 1517613774.03574), ('st_mtime', 1517614810.235624), ('st_size', 14181), ('st_atime', 1517613774.035743), ('st_nlink', 1), ('st_mode', 33060)])
DEBUG:fuse.log-mixin:-> open /<node_id:ffffffffffff>/tag/sd/0/dblk/.recnum (<fuse.fuse_file_info object at 0x75eee350>,)
DEBUG:fuse.log-mixin:<- open 0
DEBUG:fuse.log-mixin:-> read /<node_id:ffffffffffff>/tag/sd/0/dblk/.recnum (4096L, 0L, <fuse.fuse_file_info object at 0x75eee3f0>)
0 [u'<node_id:ffffffffffff>', u'tag', u'sd', u'0', u'dblk', u'.recnum']
traverse <node_id:ffffffffffff> False  <class 'taghandlers.FileHandler'> False <type 'type'>
traverse <node_id:ffffffffffff> True <node_id:ffffffffffff> <class 'taghandlers.DirHandler'> True <type 'type'>
True
1 [u'<node_id:ffffffffffff>', u'tag', u'sd', u'0', u'dblk', u'.recnum']
traverse tag False  <class 'taghandlers.FileHandler'> False <type 'type'>
traverse tag True tag <class 'taghandlers.DirHandler'> True <type 'type'>
True
2 [u'<node_id:ffffffffffff>', u'tag', u'sd', u'0', u'dblk', u'.recnum']
traverse sd False  <class 'taghandlers.FileHandler'> False <type 'type'>
traverse sd True sd <class 'taghandlers.DirHandler'> True <type 'type'>
True
3 [u'<node_id:ffffffffffff>', u'tag', u'sd', u'0', u'dblk', u'.recnum']
traverse 0 False  <class 'taghandlers.FileHandler'> False <type 'type'>
traverse 0 True 0 <class 'taghandlers.DirHandler'> True <type 'type'>
True
4 [u'<node_id:ffffffffffff>', u'tag', u'sd', u'0', u'dblk', u'.recnum']
traverse dblk False  <class 'taghandlers.FileHandler'> False <type 'type'>
traverse dblk False img <class 'taghandlers.ImageDirHandler'> True <type 'type'>
traverse dblk True dblk <class 'taghandlers.DirHandler'> True <type 'type'>
True
5 [u'<node_id:ffffffffffff>', u'tag', u'sd', u'0', u'dblk', u'.recnum']
traverse last .recnum False  <class 'taghandlers.FileHandler'>
traverse last .recnum False byte <class 'taghandlers.DirHandler'>
traverse last .recnum False note <class 'taghandlers.DblkIONoteHandler'>
traverse last .recnum True .recnum <class 'taghandlers.ByteIOFileHandler'>
[(tlv_types.NODE_ID, ffffffffffff), (tlv_types.STRING, tag), (tlv_types.STRING, sd), (tlv_types.INTEGER, 0), (tlv_types.STRING, dblk), (tlv_types.STRING, .recnum), (tlv_types.OFFSET, 0), (tlv_types.SIZE, 4096)]
[(tlv_types.NODE_ID, ffffffffffff), (tlv_types.STRING, tag), (tlv_types.STRING, sd), (tlv_types.INTEGER, 0), (tlv_types.STRING, dblk), (tlv_types.STRING, .recnum), (tlv_types.OFFSET, 0), (tlv_types.SIZE, 4096)]
[(tlv_types.NODE_ID, ffffffffffff), (tlv_types.STRING, tag), (tlv_types.STRING, sd), (tlv_types.INTEGER, 0), (tlv_types.STRING, dblk), (tlv_types.STRING, .recnum), (tlv_types.OFFSET, 0), (tlv_types.SIZE, 4096)]
[(tlv_types.NODE_ID, ffffffffffff), (tlv_types.STRING, tag), (tlv_types.STRING, sd), (tlv_types.INTEGER, 0), (tlv_types.STRING, dblk), (tlv_types.STRING, .recnum), (tlv_types.OFFSET, 0), (tlv_types.SIZE, 4096)]
[(tlv_types.NODE_ID, ffffffffffff), (tlv_types.STRING, tag), (tlv_types.STRING, sd), (tlv_types.INTEGER, 0), (tlv_types.STRING, dblk), (tlv_types.STRING, .recnum), (tlv_types.OFFSET, 0), (tlv_types.SIZE, 4096)]
[(tlv_types.NODE_ID, ffffffffffff), (tlv_types.STRING, tag), (tlv_types.STRING, sd), (tlv_types.INTEGER, 0), (tlv_types.STRING, dblk), (tlv_types.STRING, .recnum), (tlv_types.OFFSET, 0), (tlv_types.SIZE, 4096)]
[(tlv_types.NODE_ID, ffffffffffff), (tlv_types.STRING, tag), (tlv_types.STRING, sd), (tlv_types.INTEGER, 0), (tlv_types.STRING, dblk), (tlv_types.STRING, .recnum), (tlv_types.OFFSET, 0), (tlv_types.SIZE, 4096)]
[(tlv_types.NODE_ID, ffffffffffff), (tlv_types.STRING, tag), (tlv_types.STRING, sd), (tlv_types.INTEGER, 0), (tlv_types.STRING, dblk), (tlv_types.STRING, .recnum), (tlv_types.OFFSET, 0), (tlv_types.SIZE, 4096)]
[(tlv_types.NODE_ID, ffffffffffff), (tlv_types.STRING, tag), (tlv_types.STRING, sd), (tlv_types.INTEGER, 0), (tlv_types.STRING, dblk), (tlv_types.STRING, .recnum), (tlv_types.OFFSET, 0), (tlv_types.SIZE, 4096)]
[(tlv_types.NODE_ID, ffffffffffff), (tlv_types.STRING, tag), (tlv_types.STRING, sd), (tlv_types.INTEGER, 0), (tlv_types.STRING, dblk), (tlv_types.STRING, .recnum), (tlv_types.OFFSET, 0), (tlv_types.SIZE, 4096)]
[(tlv_types.NODE_ID, ffffffffffff), (tlv_types.STRING, tag), (tlv_types.STRING, sd), (tlv_types.INTEGER, 0), (tlv_types.STRING, dblk), (tlv_types.STRING, .recnum), (tlv_types.OFFSET, 0), (tlv_types.SIZE, 4096)]
[(tlv_types.NODE_ID, ffffffffffff), (tlv_types.STRING, tag), (tlv_types.STRING, sd), (tlv_types.INTEGER, 0), (tlv_types.STRING, dblk), (tlv_types.STRING, .recnum), (tlv_types.OFFSET, 0), (tlv_types.SIZE, 4096)]
[(tlv_types.NODE_ID, ffffffffffff), (tlv_types.STRING, tag), (tlv_types.STRING, sd), (tlv_types.INTEGER, 0), (tlv_types.STRING, dblk), (tlv_types.STRING, .recnum), (tlv_types.OFFSET, 0), (tlv_types.SIZE, 4096)]

[danome]

Fixed in commit 22e7c409 on danome/dm_working.