LU-15367 llite: add lseek to iotrace

Add iotrace messages for lseek.

Credit to Qian Yingjin <qian@ddn.com> for original patch.

Test-Parameters: trivial
Signed-off-by: Patrick Farrell <pfarrell@whamcloud.com>
Change-Id: I2beed5e80ea9a3d6278ddd40e9deb6b56754fabe
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/52004
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>

diff --git a/lustre/llite/file.c b/lustre/llite/file.c
index a577dea..64863b9 100644 (file)
--- a/lustre/llite/file.c
+++ b/lustre/llite/file.c
@@ -4868,6 +4868,15 @@ static loff_t ll_lseek(struct file *file, loff_t offset, int whence)
        RETURN(retval);
 }
 
+#define LU_SEEK_NAMES {                                        \
+       [SEEK_SET]      = "SEEK_SET",                   \
+       [SEEK_CUR]      = "SEEK_CUR",                   \
+       [SEEK_DATA]     = "SEEK_DATA",                  \
+       [SEEK_HOLE]     = "SEEK_HOLE",                  \
+}
+
+static const char *const ll_seek_names[] = LU_SEEK_NAMES;
+
 static loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
 {
        struct inode *inode = file_inode(file);
@@ -4876,9 +4885,11 @@ static loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
 
        ENTRY;
 
-       CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), to=%llu=%#llx(%d)\n",
-              PFID(ll_inode2fid(inode)), inode, retval, retval,
-              origin);
+       CDEBUG(D_VFSTRACE|D_IOTRACE,
+              "START file %s:"DFID", offset: %lld, type: %s\n",
+              file_dentry(file)->d_name.name,
+              PFID(ll_inode2fid(file_inode(file))), offset,
+              ll_seek_names[origin]);
 
        if (origin == SEEK_END) {
                retval = ll_glimpse_size(inode);
@@ -4906,6 +4917,12 @@ static loff_t ll_file_seek(struct file *file, loff_t offset, int origin)
        if (retval >= 0)
                ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LLSEEK,
                                   ktime_us_delta(ktime_get(), kstart));
+       CDEBUG(D_VFSTRACE|D_IOTRACE,
+              "COMPLETED file %s:"DFID", offset: %lld, type: %s, result: %lld\n",
+              file_dentry(file)->d_name.name,
+              PFID(ll_inode2fid(file_inode(file))), offset,
+              ll_seek_names[origin], retval);
+
        RETURN(retval);
 }