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15bed8c46b
freebsd-nq/sys/fs
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Rick Macklem 15bed8c46b nfsclient: add nfs node locking around uses of n_direofoffset 
During code inspection I noticed that the n_direofoffset field
of the NFS node was being manipulated without any lock being
held to make it SMP safe.
This patch adds locking of the NFS node's mutex around
handling of n_direofoffset to make it SMP safe.

I have not seen any failure that could be attributed to n_direofoffset
being manipulated concurrently by multiple processors, but I think this
is possible, since directories are read with shared vnode
locking, plus locks only on individual buffer cache blocks.
However, there have been as yet unexplained issues w.r.t reading
large directories over NFS that could have conceivably been caused
by concurrent manipulation of n_direofoffset.

MFC after:	2 weeks
2021-02-28 14:53:54 -08:00
..
autofs Ensure that dirent's d_off field is initialized 2021-01-03 11:50:31 -05:00
cd9660 Make MAXPHYS tunable. Bump MAXPHYS to 1M. 2020-11-28 12:12:51 +00:00
cuse Fix for loading cuse.ko via rc.d . Make sure we declare the cuse(3) 2020-10-23 08:44:53 +00:00
deadfs vn_open(): If the vnode is reclaimed during open(2), do not return error. 2021-02-12 03:02:20 +02:00
devfs Remove #define _KERNEL hacks from libprocstat 2021-02-21 11:38:21 +02:00
ext2fs ext2fs: clear write cluster tracking on truncation 2021-02-21 11:38:21 +02:00
fdescfs Convert remaining cap_rights_init users to cap_rights_init_one 2021-01-12 13:16:10 +00:00
fifofs fs: clean up empty lines in .c and .h files 2020-09-01 21:18:40 +00:00
fuse vnode: move write cluster support data to inodes. 2021-02-21 11:38:21 +02:00
mntfs Add a new "mntfs" pseudo file system which provides private device vnodes for 2020-03-06 18:41:37 +00:00
msdosfs Fix makefs bootstrap after d485c77f20 2021-02-22 17:55:45 +00:00
nfs Fix diroffdiroff, probably copy/paste bug. 2021-02-28 09:08:31 -05:00
nfsclient nfsclient: add nfs node locking around uses of n_direofoffset 2021-02-28 14:53:54 -08:00
nfsserver nfsserver: use VOP_VPUT_PAIR(). 2021-02-12 03:02:21 +02:00
nullfs nullfs: provide special bypass for VOP_VPUT_PAIR 2021-02-12 03:02:20 +02:00
procfs Close races in vm object chain traversal for unlock 2021-02-25 12:11:19 -08:00
pseudofs Add sbuf streaming mode to pseudofs(9), use in linprocfs(5) 2020-11-05 06:48:51 +00:00
smbfs Ensure that dirent's d_off field is initialized 2021-01-03 11:50:31 -05:00
tmpfs tmpfs: implement pathconf(_PC_SYMLINK_MAX) 2021-01-29 09:30:25 +00:00
udf Make MAXPHYS tunable. Bump MAXPHYS to 1M. 2020-11-28 12:12:51 +00:00
unionfs Split out cwd/root/jail, cmask state from filedesc table 2020-11-17 21:14:13 +00:00