diff options
Diffstat (limited to 'fs/nfsd/nfsctl.c')
| -rw-r--r-- | fs/nfsd/nfsctl.c | 49 |
1 files changed, 43 insertions, 6 deletions
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 5c6a477c20ec3..39aed901514b0 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -57,6 +57,7 @@ enum { NFSD_Pool_Threads, NFSD_Versions, NFSD_Ports, + NFSD_MaxBlkSize, /* * The below MUST come last. Otherwise we leave a hole in nfsd_files[] * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops @@ -82,6 +83,7 @@ static ssize_t write_threads(struct file *file, char *buf, size_t size); static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); static ssize_t write_versions(struct file *file, char *buf, size_t size); static ssize_t write_ports(struct file *file, char *buf, size_t size); +static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); #ifdef CONFIG_NFSD_V4 static ssize_t write_leasetime(struct file *file, char *buf, size_t size); static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); @@ -100,6 +102,7 @@ static ssize_t (*write_op[])(struct file *, char *, size_t) = { [NFSD_Pool_Threads] = write_pool_threads, [NFSD_Versions] = write_versions, [NFSD_Ports] = write_ports, + [NFSD_MaxBlkSize] = write_maxblksize, #ifdef CONFIG_NFSD_V4 [NFSD_Leasetime] = write_leasetime, [NFSD_RecoveryDir] = write_recoverydir, @@ -523,18 +526,20 @@ static ssize_t write_ports(struct file *file, char *buf, size_t size) err = nfsd_create_serv(); if (!err) { int proto = 0; - err = lockd_up(proto); - if (!err) { - err = svc_addsock(nfsd_serv, fd, buf, &proto); - if (err) - lockd_down(); + err = svc_addsock(nfsd_serv, fd, buf, &proto); + if (err >= 0) { + err = lockd_up(proto); + if (err < 0) + svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf); } /* Decrease the count, but don't shutdown the * the service */ + lock_kernel(); nfsd_serv->sv_nrthreads--; + unlock_kernel(); } - return err; + return err < 0 ? err : 0; } if (buf[0] == '-') { char *toclose = kstrdup(buf+1, GFP_KERNEL); @@ -545,12 +550,43 @@ static ssize_t write_ports(struct file *file, char *buf, size_t size) if (nfsd_serv) len = svc_sock_names(buf, nfsd_serv, toclose); unlock_kernel(); + if (len >= 0) + lockd_down(); kfree(toclose); return len; } return -EINVAL; } +int nfsd_max_blksize; + +static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) +{ + char *mesg = buf; + if (size > 0) { + int bsize; + int rv = get_int(&mesg, &bsize); + if (rv) + return rv; + /* force bsize into allowed range and + * required alignment. + */ + if (bsize < 1024) + bsize = 1024; + if (bsize > NFSSVC_MAXBLKSIZE) + bsize = NFSSVC_MAXBLKSIZE; + bsize &= ~(1024-1); + lock_kernel(); + if (nfsd_serv && nfsd_serv->sv_nrthreads) { + unlock_kernel(); + return -EBUSY; + } + nfsd_max_blksize = bsize; + unlock_kernel(); + } + return sprintf(buf, "%d\n", nfsd_max_blksize); +} + #ifdef CONFIG_NFSD_V4 extern time_t nfs4_leasetime(void); @@ -616,6 +652,7 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent) [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, + [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, #ifdef CONFIG_NFSD_V4 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |