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authorChristof Schmitt <christof.schmitt@us.ibm.com>2012-03-02 14:26:24 -0700
committerChristian Ambach <ambi@samba.org>2012-03-22 18:41:22 +0100
commit62616784ae5460bfd8f68ccfe596f80f55727b87 (patch)
tree2e860c5e93939fa27affcee669519be687c759d6 /source3/modules
parenta9cfd80d8722f9af7fc18ea70115a6b1b1033168 (diff)
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s3:vfs_gpfs: Report disk space and usage on GPFS share according to quotas
When a client requests the information about free space and space used, adjust the reported values according to quotas in the GPFS file system: - Retrieve quotas for the current user, current group and fileset for the top level of the share. - If the soft block quota grace time has expired, report disk as full. - If a hard block quota has been exceeded, report disk as full. - If none of the hard block quotas been exceeded, report share size and free space according to the lowest limits found in the quotas. - If no applicable hard block quota has been set, report the information from the statfs call. This feature is disabled by default and has to be enabled by setting the option gpfs:dfreequota.
Diffstat (limited to 'source3/modules')
-rw-r--r--source3/modules/vfs_gpfs.c129
1 files changed, 129 insertions, 0 deletions
diff --git a/source3/modules/vfs_gpfs.c b/source3/modules/vfs_gpfs.c
index 6a9d3d5b84..9597999232 100644
--- a/source3/modules/vfs_gpfs.c
+++ b/source3/modules/vfs_gpfs.c
@@ -33,6 +33,7 @@
#include "nfs4_acls.h"
#include "vfs_gpfs.h"
#include "system/filesys.h"
+#include "auth.h"
struct gpfs_config_data {
bool sharemodes;
@@ -42,6 +43,7 @@ struct gpfs_config_data {
bool winattr;
bool ftruncate;
bool getrealfilename;
+ bool dfreequota;
};
@@ -1385,6 +1387,9 @@ int vfs_gpfs_connect(struct vfs_handle_struct *handle, const char *service,
config->getrealfilename = lp_parm_bool(SNUM(handle->conn), "gpfs",
"getrealfilename", true);
+ config->dfreequota = lp_parm_bool(SNUM(handle->conn), "gpfs",
+ "dfreequota", false);
+
SMB_VFS_HANDLE_SET_DATA(handle, config,
NULL, struct gpfs_config_data,
return -1);
@@ -1392,6 +1397,129 @@ int vfs_gpfs_connect(struct vfs_handle_struct *handle, const char *service,
return 0;
}
+static int vfs_gpfs_get_quotas(const char *path, uid_t uid, gid_t gid,
+ int *fset_id,
+ struct gpfs_quotaInfo *qi_user,
+ struct gpfs_quotaInfo *qi_group,
+ struct gpfs_quotaInfo *qi_fset)
+{
+ int err;
+
+ err = get_gpfs_fset_id(path, fset_id);
+ if (err) {
+ DEBUG(0, ("Get fset id failed, errno %d.\n", errno));
+ return err;
+ }
+
+ err = get_gpfs_quota(path, GPFS_USRQUOTA, uid, qi_user);
+ if (err) {
+ return err;
+ }
+
+ err = get_gpfs_quota(path, GPFS_GRPQUOTA, gid, qi_group);
+ if (err) {
+ return err;
+ }
+
+ err = get_gpfs_quota(path, GPFS_FILESETQUOTA, *fset_id, qi_fset);
+ if (err) {
+ return err;
+ }
+
+ return 0;
+}
+
+static void vfs_gpfs_disk_free_quota(struct gpfs_quotaInfo qi, time_t cur_time,
+ uint64_t *dfree, uint64_t *dsize)
+{
+ uint64_t usage, limit;
+
+ /*
+ * The quota reporting is done in units of 1024 byte blocks, but
+ * sys_fsusage uses units of 512 byte blocks, adjust the block number
+ * accordingly. Also filter possibly negative usage counts from gpfs.
+ */
+ usage = qi.blockUsage < 0 ? 0 : (uint64_t)qi.blockUsage * 2;
+ limit = (uint64_t)qi.blockHardLimit * 2;
+
+ /*
+ * When the grace time for the exceeded soft block quota has been
+ * exceeded, the soft block quota becomes an additional hard limit.
+ */
+ if (qi.blockGraceTime && cur_time > qi.blockGraceTime) {
+ /* report disk as full */
+ *dfree = 0;
+ *dsize = MIN(*dsize, usage);
+ }
+
+ if (!qi.blockHardLimit)
+ return;
+
+ if (usage >= limit) {
+ /* report disk as full */
+ *dfree = 0;
+ *dsize = MIN(*dsize, usage);
+
+ } else {
+ /* limit has not been reached, determine "free space" */
+ *dfree = MIN(*dfree, limit - usage);
+ *dsize = MIN(*dsize, limit);
+ }
+}
+
+static uint64_t vfs_gpfs_disk_free(vfs_handle_struct *handle, const char *path,
+ bool small_query, uint64_t *bsize,
+ uint64_t *dfree, uint64_t *dsize)
+{
+ struct security_unix_token *utok;
+ struct gpfs_quotaInfo qi_user, qi_group, qi_fset;
+ struct gpfs_config_data *config;
+ int err, fset_id;
+ time_t cur_time;
+
+ SMB_VFS_HANDLE_GET_DATA(handle, config, struct gpfs_config_data,
+ return (uint64_t)-1);
+ if (!config->dfreequota) {
+ return SMB_VFS_NEXT_DISK_FREE(handle, path, small_query,
+ bsize, dfree, dsize);
+ }
+
+ err = sys_fsusage(path, dfree, dsize);
+ if (err) {
+ DEBUG (0, ("Could not get fs usage, errno %d\n", errno));
+ return SMB_VFS_NEXT_DISK_FREE(handle, path, small_query,
+ bsize, dfree, dsize);
+ }
+
+ /* sys_fsusage returns units of 512 bytes */
+ *bsize = 512;
+
+ DEBUG(10, ("fs dfree %llu, dsize %llu\n",
+ (unsigned long long)*dfree, (unsigned long long)*dsize));
+
+ utok = handle->conn->session_info->unix_token;
+ err = vfs_gpfs_get_quotas(path, utok->uid, utok->gid, &fset_id,
+ &qi_user, &qi_group, &qi_fset);
+ if (err) {
+ return SMB_VFS_NEXT_DISK_FREE(handle, path, small_query,
+ bsize, dfree, dsize);
+ }
+
+ cur_time = time(NULL);
+
+ /* Adjust free space and size according to quota limits. */
+ vfs_gpfs_disk_free_quota(qi_user, cur_time, dfree, dsize);
+ vfs_gpfs_disk_free_quota(qi_group, cur_time, dfree, dsize);
+
+ /* Id 0 indicates the default quota, not an actual quota */
+ if (fset_id != 0) {
+ vfs_gpfs_disk_free_quota(qi_fset, cur_time, dfree, dsize);
+ }
+
+ disk_norm(small_query, bsize, dfree, dsize);
+ return *dfree;
+}
+
static uint32_t vfs_gpfs_capabilities(struct vfs_handle_struct *handle,
enum timestamp_set_resolution *p_ts_res)
{
@@ -1429,6 +1557,7 @@ static int vfs_gpfs_open(struct vfs_handle_struct *handle,
static struct vfs_fn_pointers vfs_gpfs_fns = {
.connect_fn = vfs_gpfs_connect,
+ .disk_free_fn = vfs_gpfs_disk_free,
.fs_capabilities_fn = vfs_gpfs_capabilities,
.kernel_flock_fn = vfs_gpfs_kernel_flock,
.linux_setlease_fn = vfs_gpfs_setlease,