diff options
Diffstat (limited to 'fs/nfsd/nfsctl.c')
| -rw-r--r-- | fs/nfsd/nfsctl.c | 189 |
1 files changed, 179 insertions, 10 deletions
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 7046ac9cf97fa1..39aed901514b0c 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -23,10 +23,14 @@ #include <linux/pagemap.h> #include <linux/init.h> #include <linux/string.h> +#include <linux/smp_lock.h> +#include <linux/ctype.h> #include <linux/nfs.h> #include <linux/nfsd_idmap.h> +#include <linux/lockd/bind.h> #include <linux/sunrpc/svc.h> +#include <linux/sunrpc/svcsock.h> #include <linux/nfsd/nfsd.h> #include <linux/nfsd/cache.h> #include <linux/nfsd/xdr.h> @@ -35,8 +39,6 @@ #include <asm/uaccess.h> -unsigned int nfsd_versbits = ~0; - /* * We have a single directory with 9 nodes in it. */ @@ -52,7 +54,10 @@ enum { NFSD_List, NFSD_Fh, NFSD_Threads, + 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 @@ -75,7 +80,10 @@ static ssize_t write_getfd(struct file *file, char *buf, size_t size); static ssize_t write_getfs(struct file *file, char *buf, size_t size); static ssize_t write_filehandle(struct file *file, char *buf, size_t size); 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); @@ -91,7 +99,10 @@ static ssize_t (*write_op[])(struct file *, char *, size_t) = { [NFSD_Getfs] = write_getfs, [NFSD_Fh] = write_filehandle, [NFSD_Threads] = write_threads, + [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, @@ -358,6 +369,72 @@ static ssize_t write_threads(struct file *file, char *buf, size_t size) return strlen(buf); } +extern int nfsd_nrpools(void); +extern int nfsd_get_nrthreads(int n, int *); +extern int nfsd_set_nrthreads(int n, int *); + +static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) +{ + /* if size > 0, look for an array of number of threads per node + * and apply them then write out number of threads per node as reply + */ + char *mesg = buf; + int i; + int rv; + int len; + int npools = nfsd_nrpools(); + int *nthreads; + + if (npools == 0) { + /* + * NFS is shut down. The admin can start it by + * writing to the threads file but NOT the pool_threads + * file, sorry. Report zero threads. + */ + strcpy(buf, "0\n"); + return strlen(buf); + } + + nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); + if (nthreads == NULL) + return -ENOMEM; + + if (size > 0) { + for (i = 0; i < npools; i++) { + rv = get_int(&mesg, &nthreads[i]); + if (rv == -ENOENT) + break; /* fewer numbers than pools */ + if (rv) + goto out_free; /* syntax error */ + rv = -EINVAL; + if (nthreads[i] < 0) + goto out_free; + } + rv = nfsd_set_nrthreads(i, nthreads); + if (rv) + goto out_free; + } + + rv = nfsd_get_nrthreads(npools, nthreads); + if (rv) + goto out_free; + + mesg = buf; + size = SIMPLE_TRANSACTION_LIMIT; + for (i = 0; i < npools && size > 0; i++) { + snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); + len = strlen(mesg); + size -= len; + mesg += len; + } + + return (mesg-buf); + +out_free: + kfree(nthreads); + return rv; +} + static ssize_t write_versions(struct file *file, char *buf, size_t size) { /* @@ -372,6 +449,10 @@ static ssize_t write_versions(struct file *file, char *buf, size_t size) if (size>0) { if (nfsd_serv) + /* Cannot change versions without updating + * nfsd_serv->sv_xdrsize, and reallocing + * rq_argp and rq_resp + */ return -EBUSY; if (buf[size-1] != '\n') return -EINVAL; @@ -390,10 +471,7 @@ static ssize_t write_versions(struct file *file, char *buf, size_t size) case 2: case 3: case 4: - if (sign != '-') - NFSCTL_VERSET(nfsd_versbits, num); - else - NFSCTL_VERUNSET(nfsd_versbits, num); + nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); break; default: return -EINVAL; @@ -404,16 +482,15 @@ static ssize_t write_versions(struct file *file, char *buf, size_t size) /* If all get turned off, turn them back on, as * having no versions is BAD */ - if ((nfsd_versbits & NFSCTL_VERALL)==0) - nfsd_versbits = NFSCTL_VERALL; + nfsd_reset_versions(); } /* Now write current state into reply buffer */ len = 0; sep = ""; for (num=2 ; num <= 4 ; num++) - if (NFSCTL_VERISSET(NFSCTL_VERALL, num)) { + if (nfsd_vers(num, NFSD_AVAIL)) { len += sprintf(buf+len, "%s%c%d", sep, - NFSCTL_VERISSET(nfsd_versbits, num)?'+':'-', + nfsd_vers(num, NFSD_TEST)?'+':'-', num); sep = " "; } @@ -421,6 +498,95 @@ static ssize_t write_versions(struct file *file, char *buf, size_t size) return len; } +static ssize_t write_ports(struct file *file, char *buf, size_t size) +{ + if (size == 0) { + int len = 0; + lock_kernel(); + if (nfsd_serv) + len = svc_sock_names(buf, nfsd_serv, NULL); + unlock_kernel(); + return len; + } + /* Either a single 'fd' number is written, in which + * case it must be for a socket of a supported family/protocol, + * and we use it as an nfsd socket, or + * A '-' followed by the 'name' of a socket in which case + * we close the socket. + */ + if (isdigit(buf[0])) { + char *mesg = buf; + int fd; + int err; + err = get_int(&mesg, &fd); + if (err) + return -EINVAL; + if (fd < 0) + return -EINVAL; + err = nfsd_create_serv(); + if (!err) { + int proto = 0; + 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 < 0 ? err : 0; + } + if (buf[0] == '-') { + char *toclose = kstrdup(buf+1, GFP_KERNEL); + int len = 0; + if (!toclose) + return -ENOMEM; + lock_kernel(); + 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); @@ -483,7 +649,10 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent) [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, + [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}, |