by passing these flags to NFSv4 open request. Also make it return -EBUSY on share conflicts with other opens.
Signed-off-by: Pavel Shilovsky piastry@etersoft.ru --- fs/nfs/internal.h | 3 ++- fs/nfs/nfs4proc.c | 4 +++- fs/nfs/nfs4super.c | 9 ++++++--- fs/nfs/nfs4xdr.c | 21 +++++++++++++++++---- fs/nfs/super.c | 7 +++++-- 5 files changed, 33 insertions(+), 11 deletions(-)
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index f0e6c7d..c770830 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -6,7 +6,8 @@ #include <linux/mount.h> #include <linux/security.h>
-#define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) +#define NFS_MS_MASK (MS_RDONLY | MS_NOSUID | MS_NODEV | MS_NOEXEC | \ + MS_SYNCHRONOUS | MS_SHARELOCK)
struct nfs_string;
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 3cb5e77..5d44763 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -100,7 +100,7 @@ static int nfs4_map_errors(int err) case -NFS4ERR_BADNAME: return -EINVAL; case -NFS4ERR_SHARE_DENIED: - return -EACCES; + return -EBUSY; case -NFS4ERR_MINOR_VERS_MISMATCH: return -EPROTONOSUPPORT; case -NFS4ERR_ACCESS: @@ -793,6 +793,8 @@ static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, atomic_inc(&sp->so_count); p->o_arg.fh = NFS_FH(dir); p->o_arg.open_flags = flags; + if (!IS_SHARELOCK(dir)) + p->o_arg.open_flags &= ~(O_DENYREAD | O_DENYWRITE); p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS * will return permission denied for all bits until close */ diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index 84d2e9e..ca791cd 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -28,7 +28,8 @@ static struct file_system_type nfs4_remote_fs_type = { .name = "nfs4", .mount = nfs4_remote_mount, .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, + .fs_flags = FS_RENAME_DOES_D_MOVE | FS_REVAL_DOT | + FS_BINARY_MOUNTDATA | FS_DOES_SHARELOCK, };
static struct file_system_type nfs4_remote_referral_fs_type = { @@ -36,7 +37,8 @@ static struct file_system_type nfs4_remote_referral_fs_type = { .name = "nfs4", .mount = nfs4_remote_referral_mount, .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, + .fs_flags = FS_RENAME_DOES_D_MOVE | FS_REVAL_DOT | + FS_BINARY_MOUNTDATA | FS_DOES_SHARELOCK, };
struct file_system_type nfs4_referral_fs_type = { @@ -44,7 +46,8 @@ struct file_system_type nfs4_referral_fs_type = { .name = "nfs4", .mount = nfs4_referral_mount, .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, + .fs_flags = FS_RENAME_DOES_D_MOVE | FS_REVAL_DOT | + FS_BINARY_MOUNTDATA | FS_DOES_SHARELOCK, };
static const struct super_operations nfs4_sops = { diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 26b1439..8fe0221 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -1325,7 +1325,8 @@ static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struc encode_string(xdr, name->len, name->name); }
-static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode) +static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode, + int open_flags) { __be32 *p;
@@ -1343,7 +1344,19 @@ static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode) default: *p++ = cpu_to_be32(0); } - *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */ + switch (open_flags & (O_DENYREAD|O_DENYWRITE)) { + case O_DENYREAD: + *p = cpu_to_be32(NFS4_SHARE_DENY_READ); + break; + case O_DENYWRITE: + *p = cpu_to_be32(NFS4_SHARE_DENY_WRITE); + break; + case O_DENYREAD|O_DENYWRITE: + *p = cpu_to_be32(NFS4_SHARE_DENY_BOTH); + break; + default: + *p = cpu_to_be32(0); + } }
static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg) @@ -1354,7 +1367,7 @@ static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_opena * owner 4 = 32 */ encode_nfs4_seqid(xdr, arg->seqid); - encode_share_access(xdr, arg->fmode); + encode_share_access(xdr, arg->fmode, arg->open_flags); p = reserve_space(xdr, 36); p = xdr_encode_hyper(p, arg->clientid); *p++ = cpu_to_be32(24); @@ -1491,7 +1504,7 @@ static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_close encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr); encode_nfs4_stateid(xdr, arg->stateid); encode_nfs4_seqid(xdr, arg->seqid); - encode_share_access(xdr, arg->fmode); + encode_share_access(xdr, arg->fmode, 0); }
static void diff --git a/fs/nfs/super.c b/fs/nfs/super.c index b056b16..cf9db61 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -331,7 +331,8 @@ struct file_system_type nfs4_fs_type = { .name = "nfs4", .mount = nfs_fs_mount, .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, + .fs_flags = FS_RENAME_DOES_D_MOVE | FS_REVAL_DOT | + FS_BINARY_MOUNTDATA | FS_DOES_SHARELOCK, }; EXPORT_SYMBOL_GPL(nfs4_fs_type);
@@ -2589,6 +2590,8 @@ nfs_xdev_mount(struct file_system_type *fs_type, int flags, struct nfs_server *server; struct dentry *mntroot = ERR_PTR(-ENOMEM); struct nfs_subversion *nfs_mod = NFS_SB(data->sb)->nfs_client->cl_nfs_mod; + /* save sharelock option */ + int sharelock = data->sb->s_flags & MS_SHARELOCK;
dprintk("--> nfs_xdev_mount()\n");
@@ -2600,7 +2603,7 @@ nfs_xdev_mount(struct file_system_type *fs_type, int flags, if (IS_ERR(server)) mntroot = ERR_CAST(server); else - mntroot = nfs_fs_mount_common(server, flags, + mntroot = nfs_fs_mount_common(server, flags | sharelock, dev_name, &mount_info, nfs_mod);
dprintk("<-- nfs_xdev_mount() = %ld\n",