From e8e8753f7a32ce4f636771126fc8eba0dc4ad817 Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Mon, 14 Dec 2009 12:53:32 -0500 Subject: [PATCH] nfsd: new interface to advertise export features Soon we will add the new V4ROOT flag, and allow the INSECURE flag to vary by pseudoflavor. It would be useful for nfs-utils (for example, for improved exportfs error reporting) to be able to know when this happens. Use this new interface for that purpose. Signed-off-by: J. Bruce Fields --- fs/nfsd/nfsctl.c | 21 +++++++++++++++++++++ include/linux/nfsd/export.h | 3 ++- 2 files changed, 23 insertions(+), 1 deletion(-) diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 0415680d3f58..e7051ac4dc73 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -31,6 +31,7 @@ enum { NFSD_Getfd, NFSD_Getfs, NFSD_List, + NFSD_Export_features, NFSD_Fh, NFSD_FO_UnlockIP, NFSD_FO_UnlockFS, @@ -149,6 +150,24 @@ static const struct file_operations exports_operations = { .owner = THIS_MODULE, }; +static int export_features_show(struct seq_file *m, void *v) +{ + seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); + return 0; +} + +static int export_features_open(struct inode *inode, struct file *file) +{ + return single_open(file, export_features_show, NULL); +} + +static struct file_operations export_features_operations = { + .open = export_features_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); extern int nfsd_pool_stats_release(struct inode *inode, struct file *file); @@ -1306,6 +1325,8 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent) [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, + [NFSD_Export_features] = {"export_features", + &export_features_operations, S_IRUGO}, [NFSD_FO_UnlockIP] = {"unlock_ip", &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_FO_UnlockFS] = {"unlock_filesystem", diff --git a/include/linux/nfsd/export.h b/include/linux/nfsd/export.h index ef3d416fcf67..4f1df1d7312c 100644 --- a/include/linux/nfsd/export.h +++ b/include/linux/nfsd/export.h @@ -39,7 +39,8 @@ #define NFSEXP_FSID 0x2000 #define NFSEXP_CROSSMOUNT 0x4000 #define NFSEXP_NOACL 0x8000 /* reserved for possible ACL related use */ -#define NFSEXP_ALLFLAGS 0xFE3F +/* All flags that we claim to support. (Note we don't support NOACL.) */ +#define NFSEXP_ALLFLAGS 0x7E3F /* The flags that may vary depending on security flavor: */ #define NFSEXP_SECINFO_FLAGS (NFSEXP_READONLY | NFSEXP_ROOTSQUASH \ -- 2.30.2