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1be4ec2456
There is no need to keep the dentry around for the debugfs trace files, as we can just look it up when we want to remove it later on. Simplify the structure by removing the dentries and relying on debugfs to find the dentry to remove when we want to. By doing this change, we remove the last in-kernel user that was storing the result of debugfs_create_bool(), so that api can be cleaned up. Cc: Karan Tilak Kumar <kartilak@cisco.com> Cc: Sesidhar Baddela <sebaddel@cisco.com> Cc: "James E.J. Bottomley" <jejb@linux.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: <linux-scsi@vger.kernel.org> Link: https://lore.kernel.org/r/20210518161625.3696996-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/*
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* Copyright 2014 Cisco Systems, Inc. All rights reserved.
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*
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* This program is free software; you may redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef __SNIC_TRC_H
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#define __SNIC_TRC_H
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#ifdef CONFIG_SCSI_SNIC_DEBUG_FS
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extern ssize_t simple_read_from_buffer(void __user *to,
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size_t count,
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loff_t *ppos,
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const void *from,
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size_t available);
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extern unsigned int snic_trace_max_pages;
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/* Global Data structure for trace to manage trace functionality */
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struct snic_trc_data {
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u64 ts; /* Time Stamp */
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char *fn; /* Ptr to Function Name */
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u32 hno; /* SCSI Host ID */
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u32 tag; /* Command Tag */
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u64 data[5];
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} __attribute__((__packed__));
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#define SNIC_TRC_ENTRY_SZ 64 /* in Bytes */
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struct snic_trc {
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spinlock_t lock;
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struct snic_trc_data *buf; /* Trace Buffer */
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u32 max_idx; /* Max Index into trace buffer */
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u32 rd_idx;
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u32 wr_idx;
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bool enable; /* Control Variable for Tracing */
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};
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int snic_trc_init(void);
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void snic_trc_free(void);
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void snic_trc_debugfs_init(void);
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void snic_trc_debugfs_term(void);
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struct snic_trc_data *snic_get_trc_buf(void);
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int snic_get_trc_data(char *buf, int buf_sz);
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void snic_debugfs_init(void);
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void snic_debugfs_term(void);
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static inline void
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snic_trace(char *fn, u16 hno, u32 tag, u64 d1, u64 d2, u64 d3, u64 d4, u64 d5)
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{
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struct snic_trc_data *tr_rec = snic_get_trc_buf();
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if (!tr_rec)
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return;
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tr_rec->fn = (char *)fn;
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tr_rec->hno = hno;
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tr_rec->tag = tag;
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tr_rec->data[0] = d1;
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tr_rec->data[1] = d2;
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tr_rec->data[2] = d3;
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tr_rec->data[3] = d4;
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tr_rec->data[4] = d5;
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tr_rec->ts = jiffies; /* Update time stamp at last */
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}
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#define SNIC_TRC(_hno, _tag, d1, d2, d3, d4, d5) \
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do { \
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if (unlikely(snic_glob->trc.enable)) \
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snic_trace((char *)__func__, \
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(u16)(_hno), \
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(u32)(_tag), \
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(u64)(d1), \
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(u64)(d2), \
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(u64)(d3), \
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(u64)(d4), \
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(u64)(d5)); \
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} while (0)
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#else
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#define SNIC_TRC(_hno, _tag, d1, d2, d3, d4, d5) \
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do { \
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if (unlikely(snic_log_level & 0x2)) \
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SNIC_DBG("SnicTrace: %s %2u %2u %llx %llx %llx %llx %llx", \
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(char *)__func__, \
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(u16)(_hno), \
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(u32)(_tag), \
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(u64)(d1), \
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(u64)(d2), \
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(u64)(d3), \
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(u64)(d4), \
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(u64)(d5)); \
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} while (0)
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#endif /* end of CONFIG_SCSI_SNIC_DEBUG_FS */
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#define SNIC_TRC_CMD(sc) \
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((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | \
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(u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | \
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(u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | \
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(u64)sc->cmnd[5])
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#define SNIC_TRC_CMD_STATE_FLAGS(sc) \
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((u64) CMD_FLAGS(sc) << 32 | CMD_STATE(sc))
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#endif /* end of __SNIC_TRC_H */
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