From ce0fc43c5a09d50ff5ffe208cbb0d3a9c82f038a Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Fri, 11 May 2012 09:45:14 -0400 Subject: [PATCH] nfsd: wrap all accesses to st_deny_bmap Handle the st_deny_bmap in a similar fashion to the st_access_bmap. Add accessor functions and use those instead of bare bitops. Signed-off-by: Jeff Layton Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs4state.c | 37 +++++++++++++++++++++++++++++-------- 1 file changed, 29 insertions(+), 8 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 83066abc66bb..c474161fd4b6 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -492,6 +492,27 @@ test_access(u32 access, struct nfs4_ol_stateid *stp) return test_bit(access, &stp->st_access_bmap); } +/* set share deny for a given stateid */ +static inline void +set_deny(u32 access, struct nfs4_ol_stateid *stp) +{ + __set_bit(access, &stp->st_deny_bmap); +} + +/* clear share deny for a given stateid */ +static inline void +clear_deny(u32 access, struct nfs4_ol_stateid *stp) +{ + __clear_bit(access, &stp->st_deny_bmap); +} + +/* test whether a given stateid is denying specific access */ +static inline bool +test_deny(u32 access, struct nfs4_ol_stateid *stp) +{ + return test_bit(access, &stp->st_deny_bmap); +} + static int nfs4_access_to_omode(u32 access) { switch (access & NFS4_SHARE_ACCESS_BOTH) { @@ -2462,7 +2483,7 @@ static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, stp->st_access_bmap = 0; stp->st_deny_bmap = 0; set_access(open->op_share_access, stp); - __set_bit(open->op_share_deny, &stp->st_deny_bmap); + set_deny(open->op_share_deny, stp); stp->st_openstp = NULL; } @@ -2541,8 +2562,8 @@ nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) ret = nfserr_locked; /* Search for conflicting share reservations */ list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { - if (test_bit(deny_type, &stp->st_deny_bmap) || - test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) + if (test_deny(deny_type, stp) || + test_deny(NFS4_SHARE_DENY_BOTH, stp)) goto out; } ret = nfs_ok; @@ -2814,7 +2835,7 @@ nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *c } /* remember the open */ set_access(op_share_access, stp); - __set_bit(open->op_share_deny, &stp->st_deny_bmap); + set_deny(open->op_share_deny, stp); return nfs_ok; } @@ -3687,12 +3708,12 @@ static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_ac } static void -reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) +reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) { int i; for (i = 0; i < 4; i++) { if ((i & deny) != i) - __clear_bit(i, bmap); + clear_deny(i, stp); } } @@ -3724,14 +3745,14 @@ nfsd4_open_downgrade(struct svc_rqst *rqstp, stp->st_access_bmap, od->od_share_access); goto out; } - if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { + if (!test_deny(od->od_share_deny, stp)) { dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", stp->st_deny_bmap, od->od_share_deny); goto out; } nfs4_stateid_downgrade(stp, od->od_share_access); - reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); + reset_union_bmap_deny(od->od_share_deny, stp); update_stateid(&stp->st_stid.sc_stateid); memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); -- 2.34.1