diff options
Diffstat (limited to 'fs/nfsd/nfsctl.c')
| -rw-r--r-- | fs/nfsd/nfsctl.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 36e8e135d5a654..5c6a477c20ec30 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -54,6 +54,7 @@ enum { NFSD_List, NFSD_Fh, NFSD_Threads, + NFSD_Pool_Threads, NFSD_Versions, NFSD_Ports, /* @@ -78,6 +79,7 @@ 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); #ifdef CONFIG_NFSD_V4 @@ -95,6 +97,7 @@ 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, #ifdef CONFIG_NFSD_V4 @@ -363,6 +366,72 @@ 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) { /* @@ -544,6 +613,7 @@ 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}, #ifdef CONFIG_NFSD_V4 |